One-step Equations with Addition and Subtraction

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What is a one-step equation?

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A one-step equation is an algebraic equation that can be solved in a single step, typically involving addition or subtraction to isolate the variable.

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Subtract 15 from both sides to isolate m.

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Add 9 to both sides to isolate x.

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What does it mean to isolate a variable in an equation?

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Isolating a variable means to manipulate the equation so that the variable is on one side and all other terms are on the opposite side.

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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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What is the inverse operation of subtraction?

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The inverse operation of subtraction is addition.

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How do you check if your solution to an equation is correct?

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Substitute the solution back into the original equation to see if both sides are equal.