Solving Equations

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

What is the first step (after setting up your workspace) to complete when solving this equation?
10 - 3y = 4

• Add 10
• Subtract 10
• Add 3
• Divide by -3

Solve:
6(5x - 3) + 2 = 14

• 2
• .5
• -1
• 1

Tags

CCSS.7.EE.B.4A

Solve:
2(2x + 3) = -6(x + 9)

• 1.2
• 6
• -6
• 7.5

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.7

 Solve the equation for x.
10x + 9 = 4x - 9

• 0
• 3
• -3
• -18

Tags

CCSS.6.EE.B.5

CCSS.6.EE.B.6

 Solve the equation for x.
-8x - 8 + 3x - 6 = -3x + 2

• x = -8
• x = 8
• x = 2
• x = -2

Tags

CCSS.6.EE.B.5

CCSS.6.EE.B.6

 Solve the equation for x.
7x - 7 - 6x - 16 = 1 + 4x

• x=1
• x=-8
• x=-4
• x=10

Solve: 5x + 34 = -2(-7x + 1)

• -4
• 9
• 4
• 36/19

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.7

5 - 2t = 3t

• 1
• 5
• 3
• 2

-8y = -3y -15

• 3
• -3
• 5
• -5