3.3 Equalities & Unknowns

Solve the equation for x: x - 7 = 20. How many brownies were there before dinner if your family ate 7 brownies after dinner and you have 20 brownies left?

• 27

• 30

• 25

• 22

Tags

CCSS.6.EE.B.7

CCSS.6.EE.B.5

CCSS.6.EE.B.6

Solve the equation for x: x + 7 = 38. How much more do you have to save if you've saved $7 and your goal is to save $38?

• 31

• 30

• 32

• 29

Tags

CCSS.6.EE.B.7

CCSS.6.EE.B.5

Solve the equation for x: x + 8 = 26.

• 18

• 16

• 20

• 22

Tags

CCSS.6.EE.B.7

CCSS.6.EE.B.5

Create an example meaning for the previous problem: x + 8 = 26

Tags

CCSS.6.EE.B.7

CCSS.6.EE.B.5

Solve the equation for x: x - 98 = 113.

• 211

• 210

• 212

• 215

Tags

CCSS.6.EE.B.7

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.A.2

Solve the equation for x: 78 + x = 240.

• 162

• 150

• 170

• 180

Tags

CCSS.6.EE.B.7

CCSS.6.EE.B.5

Solve the equation for x: 15 + x = 121.

• 106

• 105

• 110

• 100

Tags

CCSS.6.EE.B.7

CCSS.6.EE.B.5

Write your own example meaning for 15 + x = 121

Tags

CCSS.6.EE.B.7

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.A.2

Solve:

-8 + x = 10

Hint: It doesn’t matter that the negative number comes first. This problem means the exact same as x - 8 = 10

• x = 18

• x = -18

• x = 2

• x = -2

Tags

CCSS.6.EE.B.7

CCSS.6.EE.B.5

CCSS.6.EE.B.6

• 1035

• -1035

• 2070

• -2070

Tags

CCSS.7.NS.A.2

CCSS.7.NS.A.3