solve equations

2x = -8

• x = -4
• x = 4
• x = -10
• x = 6

Tags

CCSS.6.EE.B.7

-48 = -6a

• a = -8
• a = 8
• a = 42
• a = -42

Tags

CCSS.6.EE.B.7

-3(4x - 10) = 42

• x = 0
• x = 1
• x = -1
• no solution

Tags

CCSS.7.EE.B.4A

12 = 2c - 4

• c = 8
• c = -8
• c = 4
• c = -4

Tags

CCSS.7.EE.B.4A

d + 5 = 10

• d = -5
• d = 5
• d = 0
• no solution

Tags

CCSS.6.EE.B.7

z - 33 = 234

• z = 267

• z = 231

• z = 317

• z = 281

Tags

CCSS.6.EE.B.7

r/6 = 18

• r = 12

• r = 68

• r = 104

• r = 108

Tags

CCSS.3.OA.A.4

What is the first step in solving this equation:
5x + 7 = 12

• Divide by 5
• Subtract 5
• Multiply by 7
• Subtract 7

Tags

CCSS.7.EE.B.4A

Find the error in the problem below
19 - 2k = 3k - 1
     +3k   +3k
19 + 1k = -1
-19           -19
k = -20

• They should have divided by 1 for the last step
• They should add 19 instead of subtracting 19
• I can not find an error
• Instead of adding 3k they should subtract 3k

Tags

CCSS.HSA.REI.A.1

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

• x = 1
• x = 2
• x = 3
• x = 4

Tags

CCSS.8.EE.C.7B