Modeling Expressions and Equations

Write the equation for the model.

• 7=x+3

• 7=x+(-3)

• 7=-x+3

• -7=x-3

Solve the equation.

• x=10

• x=-4

• x=-10

• x=4

Which equations matches the picture?

• 3B + 1 = 6

• B + 3 = 6

• 1 + 3 = 6

• 6 = 3B + 1

Use the model to solve for x

• -12

• -4

• 4

• 12

What equation is modeled? Solve the equation.

• x -6 = 13

• x + 6 = -13

• x + 6 = 13

• x - 6 = 13

Use the bar model to write an equation to represent the situation:

What does 2p+34 represent in the bar model?

• The number of pins Eva has

• The number of pins Dulcina has

• The total number of pins all together

• The extra pins that Dulcina has

Tripp and Rico are two dogs. Tripp

weighs exactly 35 pounds more than Rico.

Together, they weigh exactly 49 pounds.

What does the w represent in the bar model?

• Tripp's weight

• Rico's weight

• The total weight of both dogs together

• The extra amount of weight when compared with the other dog

Tripp and Rico are two dogs. Tripp

weighs exactly 35 pounds more than Rico.

Together, they weigh exactly 49 pounds.

What does 2w + 35 represent in the bar model?

• Tripp's weight

• Rico's weight

• The total weight of both dogs together

• The extra amount of weight when compared with the other dog

Which equation best models the bar model shown?