Equations Using Models

The model represents the equation 2x + 1 = 7. What is the first step in solving this equation?

• Divide by 2.

• Add 1 positive to each side.

• Multiply by 2.

• Add 1 negative to each side.

The model represents the equation 2x - 9 =5. What is the value of x?

• x = 14

• x = 7

• x = 4

• x = -4

Which of the following models shows 3m + 2 = 14?

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The model represents the equation 2x + 4 = 6. What is the first step in finding the value of x?

• add 6 candies to each side of the model

• add 4 candies to each side of the model

• subtract 4 candies from each side of the model

• divide the candies equally among the 2 cans

Which equations is represented by the model?

• x/3 - 9 = -15

• 9x + 3 = 18x

• 3x + 9 = 15

• -3x + 9 = 15

Which equation is represented by the model?

• 4x = 2

• x/2 = 4

• 4 = 2x

• x + x = 4

Which of the following is correct?

• 2x + 9 = 15

• 2x + 15 = 9

• 3x + 9 = 15

• -3x + 9 = 15

What is the solution of the equation represented by the model?

• n=9

• n=15

• n=6

• n=2

What is the solution of the equation represented by the model?

• 18+18 = n+n

• 2n = 36

• n=36

• n=18

What equation is represented by the model?

• 2n=8+6+4

• 2n = 18

• n+2 = 18

• 2*n=8*6*4