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What is a two-operation equation?

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A two-operation equation is an equation that requires two different operations (such as addition, subtraction, multiplication, or division) to isolate the variable and solve for its value.

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Subtract 7 from both sides to isolate the term with the variable.

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Subtract 10 from both sides.

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Subtract 19 from both sides.

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

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

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Subtract 2 from both sides.