Unit 3 HW 6: Equations w/Variables on Both Sides

What is the first thing you will do on this equation?

-11x + 9 = -2x + 45

• Inverse operations to collect variables

• Inverse operations to collect constants

• Solve by isolating the variable

• Divide both sides by -11

What step has the error?

8n - 8 = 4n + 20

Step 1: 4n - 8 = 20

Step 2: 4n = 12

Step 3: n = 3

• Step 1

  Should be

  12n - 8 = 20

• Step 2

  Should be 4n = 28

• Step 3

  Should be n = 6

• Step 1

  Should be

  8n = 4n + 12

Tags

CCSS.HSA.REI.A.1

22 + 54x = -20 + 60x

-5x - 16 = 8x - 3

 $2x\ +\ 17\ =\ 3x+9$  

22 + 54x = 10(6x - 2)

• x = 7

• x = 11

• x = -2

• x = 8

6 + 8(x-1) = 2(3x + 4)

Tags

CCSS.8.EE.C.7B

What line is the mistake?

Show correct work on your scratch paper.

• 2

• 3

• 4

• 5

Tags

CCSS.HSA.REI.A.1

What is the coefficient in this expression?

-45x +75

• 75

• 45x

• -45

• -45x

Tags

CCSS.6.EE.A.2B

Simplify.

14x - 7x + 1 - 2x

• 5x + 1

• 7x + 2

• 6x

• 6x + 1

Tags

CCSS.7.EE.A.1