Solving Equations Grade 8

Which equation has no solution?

• 3x + 7 = 7

• 7 + 3x = 3x - 7

• 15 + x = x + 15

• -2x + 5 = 5x - 2

Tags

CCSS.8.EE.C.7A

How many solutions does the equation

10-3x+10x-7=5x-5+2x+8 have?

• one solution

• two solutions

• no solution

• infinitely many solutions

Tags

CCSS.8.EE.C.7A

Solve for x: 3(x-2)= -9

• 1

• -1

• -7/3

• 3/7

Tags

CCSS.7.EE.B.4A

When equations have variables on both sides such as 3x+6=5x-2, you should move the variables to one side of the equation to simplify. What might your first step look like?

• 8x+6=-2

• 2x+6=2

• 6=2x-2

• 6=8x-2

Tags

CCSS.8.EE.C.7

Solve 6 - x = -4

• x=9

• x = -9

• x = 10

• x = -10

Tags

CCSS.6.EE.B.7

When solving equations, sometimes you have to simplify the equation first. When solving 3x + 2 + x - 6 = 25, what might your first step look like?

• 3x + 8 = 25

• 3x - 4 = 25

• 4x + 8 = 25

• 4x - 4 = 25

Tags

CCSS.7.EE.B.4A

When you solve 4(x+2) = 22, you must simplify the equation first. What would the first step look like?

• 4x + 8 = 22

• 4x + 2 = 22

• x + 8 = 22

• x + 2 = 22

Tags

CCSS.7.EE.B.4A

Solve for x: 3x + 4 = 5 ( x - 8 )

• 1.5

• 6

• 11

• 22

Tags

CCSS.8.EE.C.7

If 12x = 4 ( x + 5 , then x equals

• 1/12

• 5/8

• 1.25

• 2.5

Tags

CCSS.8.EE.C.7B

Which of the following would be an incorrect first step?

1/4 x + 9 = 3/4 x - 2

NOTE: Only one is incorrect though others might not be what WE would do but still could work.

• subtract 1/4x from both sides

• subtract 3/4x from both sides

• multiply everything through by 4

• add 1/4x and 3/4x

Tags

CCSS.8.EE.C.7