Two-Step Equations

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What is a two-step equation?

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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.

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CCSS.7.EE.B.4A

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

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

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CCSS.7.EE.B.4A

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CCSS.7.EE.B.4A

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CCSS.7.EE.B.4A

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CCSS.7.EE.B.4A

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CCSS.7.EE.B.4A

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CCSS.7.EE.B.4A

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Subtract 5 from both sides to isolate x.

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CCSS.6.EE.B.7

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

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To 'undo' an operation means to perform the inverse operation. For example, if the operation is addition, the inverse is subtraction.

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CCSS.HSA.REI.A.1

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What is the inverse operation of multiplication?

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The inverse operation of multiplication is division.

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CCSS.3.OA.C.7