Math Equations Variable on Both Sides

What is the correct step to solve for the variable ?

• add 11 to both sides

• subtract 11 from both sides

• divide 11 to both sides

• multiply 11 to both sides

Tags

CCSS.6.EE.B.7

The goal when solving an equation is to

• find what the variable is.

• check the solution.

• guess and check.

• combine like terms.

Tags

CCSS.7.EE.B.4A

What is the first step in solving the equation 2a - 4(a - 5) = 10

• Add 4 to both sides

• Add the 2a and a 

• Distribute 4 to a and -5

• Distribute -4 to a and -5

Tags

CCSS.8.EE.C.7B

-15 = 5a +12- 2a + 6

• -11

• -3

• 10

• 7

Tags

CCSS.8.EE.C.7B

Solve:
3(3x - 6) = 18

• x = 4

• x = -4

• no solution

• infinite solutions

Tags

CCSS.7.EE.B.4A

What is the first step to solve this equation:
11 - 3x = 44

• Add 3 to both sides

• Subtract 11 from both sides

• Add 11 to both sides

• Divide 3 on both sides.

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

Find the Error
What error did the student make when solving the equation:
5x + 6 =  66
5x - 6 = 66 -6
5x = 60
5*5x= 60*5
x = 300

• The student subtracted 6 from both sides instead of adding

• Student multiplied by 5 instead of dividing by 5

• Student got the wrong answer when subtracting 66-6

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

Tags

CCSS.HSA.REI.A.1

5x - 4 + 2x = 3

• 1

• 2

• 3

• 4

Tags

CCSS.8.EE.C.7B