Solving Equations x Denominator

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

Solve this equation by clearing the fraction.

• x = -18

• x = 66

• x = 5

• x = -3

Solve for x.

Mathematical Equivalence

ON

Tags

CCSS.HSA.REI.A.2

• x = 3
• x = -3
• x = 1
• x = -1

Tags

CCSS.7.EE.B.4A

• A

• B

• C

• D

Tags

CCSS.HSA.REI.A.2

How would you solve 3 = 12/bats?

• multiply both sides by bats

• add bats to both sides

• subtract 3 from 12

Tags

CCSS.6.EE.B.7

x = 98/5

• x = 98/5

• x = 28/5

• x = -28/5

• x = -98/5

Tags

CCSS.6.EE.B.7

• A
• B
• C
• D

Tags

CCSS.HSA.REI.A.2