Modeling Expressions and Equations

• x = 3
• x = 15
• x = -3
• x = -15

• x = -2

• x = -18

• x = 2

• x = 18

• x = 6
• x = 0
• x = -6
• x = 1

• x = 5
• x = -5
• x = -11
• x = 11

• x = 16
• x = -16
• x = 0
• x = 2

Which of these equations could be represented by this model?

• 3x = 9

• x + 3 = 9

• x = 12

• 2x + 3 = 10

• x = 2
• x = -12
• x = -2
• x = 12

Write the equation for the model.

• 10=2-x

• -10=-x+2

• -10=x-2

• -10=x+2

If the triangle represents the variable and each circle equals one, is this model and equation in the image correct?

• Yes

• No, there needs to be 7 circles on the right side of the equal sign.

• No, there needs to be 4 circles on the right side of the equal sign.

• No, there needs to be a minus sign in the equation.

Write the equation for the model.

• x+(-6)=-11

• x+6=-11

• x-6=11

• x+6=11