Solving Multi-Step Equations

-15 = 5a +12- 2a + 6

• a = -11

• a = -3

• a = 10

• a = 7

Tags

CCSS.8.EE.C.7B

What is the first step in solving the equation 2a - 4(a - 5) = 10

• Add 4 to both sides
• Add the 2a and a 
• Distribute 4 to a and -5
• Distribute -4 to a and -5

Tags

CCSS.8.EE.C.7B

4(a + 3) = -32

• a = -11

• a = -44

• a = -20

• a = -8

Tags

CCSS.7.EE.B.4A

22 + 2a = 37 + 6 + a

• a = 21

• a = -21

• a = 5

• a = 6

8v - 4(v + 8) = 8

• v = 2

• v = 10

• v = 4

• v = -4 

Tags

CCSS.8.EE.C.7B

2x + 3(5x - 7) = 47

• x = 1

• x = 2

• x = 3

• x = 4

Tags

CCSS.8.EE.C.7B

What is the 2nd step in solving the following equation?

3x + 7 = x - 21

2x + 7 = -21

• Divide both sides by 2

• add 7 to both sides

• Subtract 7 from both sides

• Subtract 21 from both sides

Which step is incorrect?

120 = -4(7a+2)

Step 1: 120 = -28a - 8

Step 2: 112 = -28a

Step 3: a=-4

• Problem is correct

• step 1

• step 2

• step 3

Tags

CCSS.HSA.REI.A.1