One Step Equations Add Subtract Models

In the equation
x + 7 = 12
7 is being added to the variable, x. How should you show your work to isolate the variable and solve the equation? 

• Subtract 7 from both sides. The solution is x = 5.

• Add 7 to both sides.
  The solution is x = 19.

• Multiply both sides by 7 The solution is x = 84.

Tags

CCSS.6.EE.B.7

What is your first step when you solve  x + 5 = 12

• Add 5 to 5 and add 5 to 5 to 12

• Subtract 5 from 5 and subtract 5 from 12

• Subtract 12 from 12 and subtract 12 from 5

• Add 12 to 12 and add 12 to 5

Tags

CCSS.6.EE.B.7

Solve the equation
3x = 27. 

• x = 24

• x = 81

• x = 9

Tags

CCSS.6.EE.B.7

5 less than a number is 15.

• x - 5 = 15

• 5 - x = 15

• 15 - x = 5

Write the equation for the model.

• 7=x+3

• 7=x+(-3)

• 7=-x+3

• -7=x-3

Tags

CCSS.HSA.CED.A.3

Write the equation for the model. (white square=1 rectangle=x red square = -1)

• 7=x+3

• 7=x+(-3)

• 7=-x+3

• -7=x-3

Tags

CCSS.HSA.CED.A.3

Write the equation for the model.

• 10=2-x

• -10=-x+2

• -10=x-2

• -10=x+2

Tags

CCSS.HSA.CED.A.3

Solve the equation.

x + 9 = -5

Mathematical Equivalence

OFF

Tags

CCSS.6.EE.B.7

Which choice models this situation? Marcus needs to sell 25 tickets to a fundraiser by Friday. So far, he has sold 9 tickets. How many tickets does he still need to sell?

• t - 9 = 25

• t + 9 = 25

• 9t = 25

• t/9 = 25

Tags

CCSS.HSA.CED.A.3

Solve the following equation 
8 = m - 12

• 4

• 0.5

• 5.0

• 20

Tags

CCSS.6.EE.B.7