Solving Two-Step Equations Practice

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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 inverse operations in the reverse order of operations. First, eliminate any constant added or subtracted from the variable, then eliminate any coefficient by dividing or multiplying.

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CCSS.7.EE.B.4A

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r = 28

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CCSS.7.EE.B.4A

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

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a = 9

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CCSS.7.EE.B.4A

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x = 21

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CCSS.7.EE.B.4A

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x = 168

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CCSS.7.EE.B.4A

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x = 10

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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 check your solution in an equation?

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Checking your solution means substituting the value back into the original equation to verify that both sides are equal.

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CCSS.8.EE.C.7B

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What is the inverse operation of addition?

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The inverse operation of addition is subtraction.

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CCSS.HSA.REI.A.1