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.

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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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x = 140

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CCSS.7.EE.B.4A

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x = -84

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CCSS.7.EE.B.4A

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x = 55

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CCSS.7.EE.B.4A

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x = 27

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CCSS.7.EE.B.4A

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x = 78

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CCSS.7.EE.B.4A

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Subtract 5 from both sides to isolate the term with x.

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CCSS.7.EE.B.4A

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What does it mean to perform the inverse operation?

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An inverse operation reverses the effect of the original operation, such as addition and subtraction or multiplication and division.

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CCSS.HSA.REI.A.1

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x = 7

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CCSS.6.EE.B.7