Writing and Solving 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.6.EE.B.7

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CCSS.7.EE.B.4A

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Multiply both sides by -2 to eliminate the fraction.

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CCSS.7.EE.B.4A

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CCSS.7.EE.B.4A

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What equation represents Ali's spending at camp?

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CCSS.7.EE.B.4A

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CCSS.7.EE.B.4A

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What does it mean to check your answer in an equation?

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

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CCSS.8.EE.C.7B