Solving Multi-Step Equations Involving CPT and Distribution

Solve:
3(3x - 6) = 18

• x = 4

• x = -4

• no solution

• infinite solutions

Tags

CCSS.7.EE.B.4A

Using the "opposite operation" to "undo" and isolate the variable when solving an equation is more commonly called...

• Inverse operations

• math

• variable

• PEMDAS

Tags

CCSS.7.EE.B.4A

Find the Error
What error did the student make when solving the equation:
1/5x + 6 = 3/5x + 5
1x + 6 = 3x + 5
-2x + 6 = 5
-2x = -1
x = 1/2

• The student found an incorrect common denominator

• The student did not multiply all terms by the common denominator

• The student did not use opposite operations appropriately

• The student did not correctly eliminate the variable from one side of the equation

5x - 4 + 2x = 3

• 1

• 2

• 3

• 4

Tags

CCSS.8.EE.C.7B

2x - 3 + 4x = 27

• 12

• 4

• 5

• 15

Tags

CCSS.8.EE.C.7B

5x - 4 + 2x = 3

• 1

• 2

• 3

• 4

Tags

CCSS.8.EE.C.7B

Solve.
(2x - 3) / 4  = 9

• x = 24

• x = 12

• x = 17.5

• x = 19.5

Tags

CCSS.7.EE.B.4A

Solve for x:
4 - 2(x - 3) = 24

• - 7

• 7

• 14

• - 14

Tags

CCSS.7.EE.B.4A

Solve     -20 = -4x - 6x

• x = -2

• x = 10

• x = 2

• x = -10

Tags

CCSS.8.EE.C.7B

3a + 9 + 4a = 2

• -1

• 1

• no solution

• -7

Tags

CCSS.8.EE.C.7B