Solving Two-Step Equations

Slides:

Advertisements

Similar presentations

Solve an equation with variables on both sides

Advertisements

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 one- and two-step equations. Solving One-Step Equations using Additive Inverse Steps Given the equation x + 4 = 9 use the inverse of adding 4.

Standardized Test Practice

Standardized Test Practice

Solve the equation -3v = -21 Multiply or Divide? 1.

EXAMPLE 2 Rationalize denominators of fractions Simplify

Equations – Success if you can do these 3x = 64x + 2 = 3x + 7 x/4 = 25x – 3 = 7 + 3x x + 3 = 173(x + 2) = 12 x – 4 = 134(x + 5) = 32 3x + 4 = 253(2x –

Solve an equation by combining like terms EXAMPLE 1 8x – 3x – 10 = 20 Write original equation. 5x – 10 = 20 Combine like terms. 5x – =

Solving Linear Equations Substitution. Find the common solution for the system y = 3x + 1 y = x + 5 There are 4 steps to this process Step 1:Substitute.

Warm Up Solve. 1. 3x = = z – 100 = w = 98.6 x = 34 y = 225 z = 121 w = 19.5 y 15.

Use the substitution method

Objectives: 1.Be able to solve a system of equations by using the substitution method. 2.Be able to solve a system of equations by using the elimination.

Multiply one equation, then add

Warm Up Solve. 1. x + 5 = 9 2. x – 34 = 72 = x – 39 x = 4 x = 106

11-1 Solving Two-Step Equations Do Now Solve. 1. n + 9 = z = x = n = 8 x = 7 z = -16 = 9 y = 72 y8y8.

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 +

Solving Equations with Variables on Both Sides. Review O Suppose you want to solve -4m m = -3 What would you do as your first step? Explain.

4-6 Solving Equations with Fractions What You’ll Learn ► To solve one – step equations ► To solve two – equations.

Solving Algebraic Equations. Equality 3 = = = 7 For what value of x is: x + 4 = 7 true?

1) Solve. -5t = 60 To get the variable by itself, which number needs to be moved? -5 To move the -5, you have to do the opposite operation. What operation.

Jeopardy Solving Equations

3. 3 Solving Equations Using Addition or Subtraction 3

Section 1-3: Solving Equations

Lesson 13 ONE STEP EQUATIONS A.4e.

Solving Addition and Subtraction Equations

EXAMPLE 2 Rationalize denominators of fractions Simplify

Solving 2 Step Equations.

Solving Two-Step Equations

Students will solve two step equations (12-4).

Objective 3.6 solve multi-step inequalities.

Equations with variables on both sides Whiteboard practice

Solve for variable 3x = 6 7x = -21

Solve an equation by multiplying by a reciprocal

One-Step Equations with Subtraction

Warm up 11/1/ X ÷ 40.

Solving Linear Equations

Solving 1-Step Integer Equations

Warm-Up Solve the system by substitution..

Solving Division Equations.

Solving One Step Equations

Solving Systems of Equations by Elimination

One-Step Equations with Addition and Subtraction

Objective The student will be able to:

One Step Rational Number Equations

Solve an equation by combining like terms

Solving Systems Check Point Quiz Corrections

Equations – Success if you can do these

Solving One and Two Step Equations

Solving one- and two-step equations

Equations with Fractions

Solving One Step Equations

Equations with Fractions

Solving Equations Finding Your Balance

Solving Equations by Adding and Subtracting Solving Equations

Equations with variables on both sides Whiteboard practice

ONE STEP EQUATIONS Addition and Subtraction

Bell work Week 20.

Equations – Success if you can do these

Math-7 NOTES What are Two-Step Equations??

Solving Two Step Algebraic Equations

Solve equations using multiplication and division.

Objective The student will be able to:

Do Now Solve. n + 9 = z = 55 n = x = z = -16

Equations – Success if you can do these

Solving basic equations

Solving Equations by 2-1 Adding or Subtracting Warm Up

One-Step Equations with Addition and Subtraction

Equations – Success if you can do these

Presentation transcript:

Solving Two-Step Equations TeacherTwins©2014

Warm Up x = -68 y = 39.8 w = 8 x = 9

Solving Two-Step Equations

In order to get the “x” by itself, we need to get rid of the -1 and 3 In order to get the “x” by itself, we need to get rid of the -1 and 3. We remove the -1 by adding 1 to each side. We remove the 3 by dividing each side by 3. +1 +1 3x= 9 X=3 3 3 To check to see if your answer is correct, substitute the x in your equation with 3. Solve the equation. If it is true then the value for x is correct.

In order to get the “x” by itself, we need to get rid of the 2 and 4 In order to get the “x” by itself, we need to get rid of the 2 and 4. We remove the 2 by subtracting 2 from each side. We remove the 4 by dividing each side by 4. -2 -2 4x = 12 4 4 x = 3 To check to see if your answer is correct, substitute the x in your equation with 3. Solve the equation. If it is true then the value for x is correct.

In order to get the “n” by itself, we need to get rid of the 2 and 3 In order to get the “n” by itself, we need to get rid of the 2 and 3. We remove the 2 by subtracting 2 from each side. We remove the 3 by multiplying each side by 3. n = 12 To check to see if your answer is correct, substitute the “n” in your equation with 12. Solve the equation. If it is true then the value for “n” is correct.

x = 6 n = -23 n = 175 x = 10

Write the equation and solve. Closure Write the equation and solve. The product of 5 and a number plus 15 is 140. 5x +15 = 140 x = 25