Algebraic Modeling

Which of the following equations best represents the model given? (square=1; rectangle=-x)

• 4+3x=5

• 4-3=5

• -3x+4=5

• 4x-3=5

What is the equation for the given model? (yellow rectangle=x; red square=-1; yellow square= +1)

• -3x-4=5

• -3-4x=5

• 3-4x=5

• 3x-4=5

Which equation represents the model?

• 4x = 7

• 7 = x - 4

• 7 = x + 4

• x + 4 = 3

Tell whether the value of the variable is a solution to the equation:

7 = 13 - n; n=5

• no

• yes

Tell whether the value of the variable is a solution to the equation:

17y=85; y=5

• yes

• no

Tell whether the value of the variable is a solution to the equation:

2.5n=45; n=18

• no

• yes

Tell whether the value of the variable is a solution to the equation:

3x +x-14=18; x=8

• yes

• no

What equation is modeled?

• x - (-6) = 13

• x + 6 = 13

• x + (-6) = 13

• 6x = 13

Tell whether the value of the variable is a solution to the equation:

5 + x=47; x=52

• yes

• no

Tell whether the value of the variable is a solution to the equation:

5q=31; q=13

• yes

• no