Solving Equations and Inequalities

-2(x + 3) - 5 = 11

• x = - 11
• x = 2
• x = 11
• x = -2

Tags

CCSS.7.EE.B.4A

4x + 2(x - 6) = 12

• x = 6
• x = 4
• x = 2
• x = -2

Tags

CCSS.8.EE.C.7B

-3 − 6(4x + 6) > -111

• x > 3
• x < 3
• x < -3
• x > -3

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

Solve: 5x + 15 = 10x - 40

• x = 10

• x = -10

• x = 11

• x = -11

Solve for x:
4(1-x) + 3x = -2(x+1)

• x = -6
• x = 6
• x = 3

4k + 24 = 6k -10

• k = 17

• k =-17

• k= 5

• k = 1/5

Solve:
2(4x-3) - 8 = 4 + 2x

• x = 5/3
• x = 3
• x = 1
• x = 2

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

• y = -4
• y = 9
• y = 4
• y = 36/19

Jacob solved the following equation using the steps shown.

Step 1 5x + 9 = 2x - 3

Step 2 3x + 9 = -3

Step 3 3x = -12

Step 4 x = -4

What operation did he perform to get from Step 1 to Step 2?

• Subtracted 2x from both sides of the equation

• Subtracted 9 from both sides of the equation

• Multiplied both sides of the equation by 3

• Added -3 to both sides of the equation

Tags

CCSS.HSA.REI.A.1