Solving Two-Step Equations

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What is a two-step equation?

Back

A two-step equation is an algebraic equation that requires two operations to solve for the variable. It typically involves addition or subtraction followed by multiplication or division.

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 eliminate any addition or subtraction, then eliminate multiplication or division.

Front

Solve the equation: 15 = 2a + 7

Back

a = 4

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Solve the equation: 9 = 2s + 1

Back

s = 4

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Back

Subtract 2 from both sides to isolate the term with x.

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Back

x = 21

Front

What does it mean to 'solve for x'?

Back

To 'solve for x' means to find the value of x that makes the equation true.

Front

Back

x = 21

Front

What is the inverse operation of addition?

Back

The inverse operation of addition is subtraction.

Front

What is the inverse operation of multiplication?

Back

The inverse operation of multiplication is division.