Checking Solutions to Equations

Solve for x:

• x = 20

• x = 7

• x = 10

• x = 3

Tags

CCSS.6.EE.B.7

x - 32 = 49

• x = 17

• x = 71

• x = 81

• x = 49

Tags

CCSS.6.EE.B.7

x - 62 = 123
How should you show your work to isolate the variable and solve the equation?

• Add 62 to each side. 

• Subtract 62 from each side.

• Multiply each side by 62.

• Add 123 to each side.

Tags

CCSS.6.EE.B.7

How do you prove that your solution is correct? What is your success criteria for solving equations?

• I don't need to check: it's probably right!

• Substitution: plug the solution in for x and verify that the number sentence is true.

Tags

CCSS.7.EE.B.4A

How do you check the solution for the equation x + 8 = 3 if the solution is x = -5?

• Substitute -5 for x and verify that -5 + 8 = 3

• Substitute -5 for x and verify that -5 + 8 = 11

• Substitute 3 for x and verify that 3 + 8 = 3

• Substitute 3 for x and verify that 3 + 8 = 11

Answer explanation

The correct choice is to substitute -5 for x and verify that -5 + 8 = 3

Tags

CCSS.6.EE.B.5

How do you prove that your solution is correct? What is your success criteria for solving equations?

• I don't need to check: it's probably right!

• Substitution: plug the solution in for x and verify that the number sentence is true.

Tags

CCSS.7.EE.B.4A

Which equation has x = 5 as the solution?

• x + 15 = 10

• 2x = 5

• 2x = 10

Tags

CCSS.6.EE.B.5

x + 40 = 56

• x = 16

• x = 96

• x = 15

• x = 10

Tags

CCSS.6.EE.B.7

The variable, k, is being divided by 11. How should you show your work to isolate the variable?

• Divide both sides by 11

• Multiply both sides by 11.

• Add 11 to both sides.

• Subtract 11 to both sides.

Tags

CCSS.6.EE.B.7

Which equation has w = 8 as the solution?

• 8w= 64

• 16w = 240

• 16 - w = 9

• 4 + w = 10

Tags

CCSS.6.EE.B.5