Solving equations by multiplying or dividing. 8X = -128 88 X = -16.

Slides:



Advertisements
Similar presentations
Solving Equations = 4x – 5(6x – 10) -132 = 4x – 30x = -26x = -26x 7 = x.
Advertisements

© T Madas Finding the amount before a Percentage Change.
Objective The student will be able to: solve equations using multiplication and division. Designed by Skip Tyler, Varina High School.
Objective The student will be able to: solve equations using multiplication and division. Designed by Skip Tyler, Varina High School.
EXAMPLE 2 Solve a matrix equation SOLUTION Begin by finding the inverse of A = Solve the matrix equation AX = B for the 2 × 2 matrix X. 2 –7 –1.
Write decimal as percent. Divide each side by 136. Substitute 51 for a and 136 for b. Write percent equation. Find a percent using the percent equation.
Solving 2-step equations ax + b = c. Keep it balanced Just like when solving a one- step equation keep it balanced. Just like when solving a one- step.
3.5 Solving systems of equations in 3 variables
EXAMPLE 2 Finding a Base Marc received 273, or 35%, of the votes in the student council election. How many students voted in the election? Student Council.
1.3B MULTIPLYING AND DIVIDING INTEGERS I can multiply and divide integers to solve problems involving integers.
Solving Equations with Brackets or Fractions. Single Bracket Solve 3(x + 4) = 24 3x + 12 = 24 3x + 12 – 12 = x = 12 x = 4 Multiply brackets out.
Notes Over 5.4 Imaginary Numbers.
Solve the equation -3v = -21 Multiply or Divide? 1.
Solving Equations Foil & Conjugates Multiplying & Dividing Adding & Subtracting Simplifying
9.4 factoring to solve quadratic equations.. What are the roots of a quadratic function? Roots (x-intercepts): x values when y = 0 ( ___, 0) How do you.
How do we solve linear inequalities? Do Now: What do you remember about solving quadratic inequalities?
Solving Decimal Equations by x / ÷ Lesson 3-6. Basic Decimal Knowledge Decimal represented by . “Decimal places”  the digits that come AFTER the decimal.
Using Equations to Solve Percent Problems
Solving by Elimination Example 1: STEP 2: Look for opposite terms. STEP 1: Write both equations in Standard Form to line up like variables. STEP 5: Solve.
Jeopardy Solving Equations Add and Subtract Multiply and Divide Multi-Step Variables on each side Grouping Symbols $100 $200 $300 $400 $500 $100 $200.
Unit 4 6 th Grade Math Multipying and Dividing Fractions Review.
Two Step equations. Understand The Problem EX: Chris’s landscaping bill is 380$. The plants cost 212$,and the labor cost 48$ per hour. Total bill = plants.
Solving 2 step equations pick up a pink, yellow and green highlighter.
One step equations Add Subtract Multiply Divide  When we solve an equation, our goal is to isolate our variable by using our inverse operations.  What.
September 18, 2012 Solving Multi-Step Equations Warm-up: Compare HW answers and write problems you don’t understand up on the board.
Dividing a Decimal by a Decimal. Dividing Whole Numbers 12 ÷ 2 = 120 ÷ 20 = 1200 ÷ 200 = ÷ 2000 = Multiply both 12 and 2 by 10 Multiply.
Solving Equations Inverse operations. INVERSE = Opposite If I am solving an equation using inverses operations, I am solving it using opposite signs.
Solve Fraction Equations. Designed by Skip Tyler, Varina High School EQ: How do we solve equations of fractions using multiplication and division.
Multi Step Equations. Algebra Examples 3/8 – 1/4x = 1/2x – 3/4 3/8 – 1/4x = 1/2x – 3/4 8(3/8 – 1/4x) = 8(1/2x – 3/4) (Multiply both sides by 8) 8(3/8.
Objective The student will be able to: solve equations using multiplication and division. Designed by Skip Tyler, Edited by Mr. Nealey.
Solving 2 step equations. Two step equations have addition or subtraction and multiply or divide 3x + 1 = 10 3x + 1 = 10 4y + 2 = 10 4y + 2 = 10 2b +
DO NOW. Objective The student will be able to: solve equations using multiplication and division. Designed by Skip Tyler, Varina High School.
Solve –3j = Check your answer. –3j = 44.7 Notice j is being multiplied by –3. j = –14.9Simplify. Check –3j = 44.7 Check your solution in the original.
4-6 Solving Equations with Fractions What You’ll Learn ► To solve one – step equations ► To solve two – equations.
Solving equations with fractions and decimals. M + 3⅔ = -4⅝ Solve - 3⅔ M = ³¹/₂₄ M = -8 ⁷/₂₄ ⁷/₂₄.
Proportions How to Write and Solve Them. PROBLEM: I saw at Office Depot that pencils were priced at a dozen for $1.50 How much is it for one pencil? How.
Jeopardy Solving Equations
Splash Screen.
Objective The student will be able to:
Objective The student will be able to:
Solving Equations by Multiplying and Dividing Fractions Practice Problems By: Mrs. Sites.
Solve Systems of Equations by Elimination
Notes Over 4.2 The Multiplication Property of Equality
Equations Pre/Post Test
3-1 HW:Pg #4-28eoe, 30-48e, 55, 61,
Solve for variable 3x = 6 7x = -21
Solve an equation by multiplying by a reciprocal
Algebraic Inequalities
Objective The student will be able to:
Problem-Solving Steps Solve Problem-Solving Steps Solve
Objective The student will be able to:
Solving One-Step Equations
Solve System by Linear Combination / Addition Method
Solving Two-Step Equations
Solving Two-Step Equations
Divide the number in C by 10.
Equations – Success if you can do these
Solving Equations by Adding and Subtracting Solving Equations
Solving Equations with Variables on Both Sides 4:3
Solving Multiplication Equations
Solving Division Equations
TWO STEP EQUATIONS 1. SOLVE FOR X 2. DO THE ADDITION STEP FIRST
2.2 Solving Equations with Variables on Both Sides
IF YOU MULTIPLY or DIVIDE BY A NEGATIVE YOU MUST SWITCH THE SIGN!
Learn to solve equations with integers.
Objective The student will be able to:
Math-7 NOTES 1) 3x = 15 2) 4x = 16 Multiplication equations:
Equations – Success if you can do these
Equations – Success if you can do these
5 minutes Warm-Up Solve. 2) 1).
Presentation transcript:

Solving equations by multiplying or dividing

8X = X = -16

-4X = X = 14

X = X = -88

X = X = -343

¼X = 20 ¼ ÷ ¼ X =

-⅗X = -21 -⅗ ÷ -⅗ X =

Gary needs to buy a suit to go to a formal dance. Using a coupon, he can save $60, which is ¼ of the cost of the suit. Write and solve an equation to determine the cost of the suit. ¼ · x = $60 ¼ ÷ ¼ ÷ · = 240

Pg. 41 – 43 2 – 76 even BUT skip 18, 20, 40, 42, 54, 58

Answer Bank For Solving Equations By multiplying And dividing Skip 18, 20, 40, 42, 54, 58