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Modeling and Solving Two-Step Equations through explorelearning.com. SEVENTH GRADE MATH Moving Straight Ahead Investigation 4.2. A. The first equation that you will see is 2x + 2 = 6 . Part 1. Modeling the equation. 1. The left side of the equation is 2x + 2.

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modeling and solving two step equations through explorelearning com

Modeling and Solving Two-Step Equationsthrough explorelearning.com

SEVENTH GRADE MATH

Moving Straight Ahead

Investigation 4.2

a the first equation that you will see is 2x 2 6 part 1 modeling the equation
A.The first equation that you will see is 2x + 2 = 6.Part 1. Modeling the equation

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

slide3

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

slide17

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?

slide20

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?

check for understanding with a new problem model and solve the equation 3x 4 16
Check for Understanding with a new problemModel and solve the equation 3x + 4 = 16.

3x + 4 = 16

3(4) + 4 = 16

12 + 4 = 16

16 = 16

The solution x = 4 is correct