Two Step Equations

Front

What is a two-step equation?

Back

A two-step equation is an algebraic equation that requires two operations to solve for the variable.

Tags

CCSS.7.EE.B.4A

Front

How do you isolate a variable in a two-step equation?

Back

To isolate a variable, perform the inverse operations in reverse order: first undo addition or subtraction, then undo multiplication or division.

Tags

CCSS.7.EE.B.4A

Front

Solve: -3x - 12 = 15

Back

x = -9

Tags

CCSS.7.EE.B.4A

Front

Solve: 2s - 4 = 6

Back

s = 5

Tags

CCSS.7.EE.B.4A

Front

Solve: x/3 + 5 = -1

Back

x = -18

Tags

CCSS.7.EE.B.4A

Front

Solve: 7k - 14 = 42

Back

k = 8

Tags

CCSS.7.EE.B.4A

Front

Solve: x/5 - 13 = 20

Back

x = 165

Tags

CCSS.7.EE.B.4A

Front

What is the first step to solve the equation 2x + 3 = 11?

Back

Subtract 3 from both sides to get 2x = 8.

Tags

CCSS.7.EE.B.4A

Front

What is the second step to solve the equation 2x = 8?

Back

Divide both sides by 2 to get x = 4.

Tags

CCSS.6.EE.B.7

Front

What does it mean to 'undo' an operation in algebra?

Back

To 'undo' an operation means to perform the opposite operation to isolate the variable.

Tags

CCSS.6.EE.B.7