Solve 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 x: 3x + 1 = 10

Back

x = 3

Front

Solve for s: 8(s + 3) = 72

Back

s = 6

Front

Solve for t: (t + 9)20 = 140

Back

t = -2

Front

Solve for v: (v + 5)(-1/9) = 6

Back

v = -59

Front

Solve for x: 12(x - 20) = -48

Back

x = 16

Front

What is the first step to solve the equation 2x + 4 = 12?

Back

Subtract 4 from both sides to get 2x = 8.

Front

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

Back

Divide both sides by 2 to get x = 4.

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.