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.

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.

Front

Solve for s: 9 = 2s + 1

Back

s = 4

Front

Solve for z: 0 = 8z + 8

Back

z = -1

Front

Solve for a: -5 - 6a = -59

Back

a = 9

Front

Solve for d: 5d - 6 = 9

Back

d = 3

Front

Solve for k: 2k + 12 = -4

Back

k = -8

Front

What is the first step to solve the equation 3x + 5 = 20?

Back

Subtract 5 from both sides to get 3x = 15.

Front

What is the second step to solve the equation 3x = 15?

Back

Divide both sides by 3 to get x = 5.

Front

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

Back

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