Solving Two-Step Equations 7 th Grade 2012-2013. Standard – 7.EE.3 I can use expressions and equations to solve multi-step, real-life problems using positive.

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Presentation transcript:

Solving Two-Step Equations 7 th Grade

Standard – 7.EE.3 I can use expressions and equations to solve multi-step, real-life problems using positive and negative rational numbers.

What is a Two-Step Equation? Put in your own words Two-Step Equation: An equation that can be solved using two operations.

W. A. C. You can “WAC” these equation! YAY! Don’t Forget…

Objective – Find the value of the variable by solving equations involving two steps. Hard wayEasy way 3x + 4 = 16 - Undo Multiplication or Division first - Undo Addition or Subtraction first 3x + 4 = 16

Hard wayEasy way 3x + 4 = x = x = 3 x = 12 3 x = x = x = 4 - Undo Mult./ Div. first - Undo Add./ Subt. first

Two-Step Equations To undo Two Operations USE “PEMDAS” IN REVERSE!!!(Undo It!) Example:3x + 1 = 7 Answer: x=2 You Try:5 = 4a – = -3 PSEAMDDMAESPPSEAMDDMAESP

Solve the following equations (WAC). Check: (10) = 40 Check: 4 + 2(4) = 12 Check: /3 = 7 Check: /7 = -2

Translate the sentence below and solve. 11) Five less than the quotient of x and 2 is 37.

Quick Draw for Points! Who is the best at showing their work? The text isTWO STEP EQUATIONSThe text is TWO STEP EQUATIONS You will have seconds for each problem. Are you ready to prove yourself?

Solve the following equations (Remember, WAC). Check: 2(12) – 5 = 19 Check: 8(3) + 1 = 25 Check: /3 = 6 Check: 35/5 – 4 = 3

Translate the sentence below and solve. 5) Eight more than 3 times a number y is the same as 29. Check: 3(7) + 8 = 29

Distributive Property (solve for x): 6.2(x + 5) = (4x + 4) = (10 + 3x) = 44 9.¾ (12x – 4) = 12

Practice: “Practice Two-Step Equations” Worksheet “Glencoe 3-5” -Solve equations from one-step section -“Writing Equations from Word Problems” -“Word Problem Prompts”

EQUATIONS BINGO! -Combination of one- step and two-step equations -Winner gets a prize! -Must show your work!!!!!!