Modeling and Solving Two-Step Equations through explorelearning.com

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Modeling and Solving Two-Step Equations through explorelearning.com

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Modeling and Solving Two-Step Equations through explorelearning.com

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Modeling and Solving Two-Step Equationsthrough explorelearning.com

SEVENTH GRADE MATH

Moving Straight Ahead

Investigation 4.2

1.The left side of the equation is 2x + 2.

a. How many x-cups will you need to model this?

You will need2 x-cups

b. How many unit counters will you need to model this?

2 unit counters

c.Drag the correct number of cups and counters to the left side of the equal sign

Part II. Using your model to solve the equation

1.You first need to subtract the unit counters from the left side and an equal number from the right side.

a. How many unit counters should be subtracted from

each side of the equation?

b. Once you isolate the variables on one side of the equation, you need to divide the remaining unit counters so that there are an equal number in each of the x-cups .

C.How many unit counters will be in each x-cup?

3x + 4 = 16

3(4) + 4 = 16

12 + 4 = 16

16 = 16

The solution x = 4 is correct