Solving Proportions and Equations

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What is a proportion?

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A proportion is an equation that states that two ratios are equal.

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How do you solve a proportion?

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To solve a proportion, cross-multiply the terms and then isolate the variable.

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What is the cross-multiplication method?

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The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio.

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x = -10

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x = 8

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x = 1.25

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What does it mean if a proportion has no solution?

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It means that the equation cannot be satisfied by any value of the variable.

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x = -26

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What is the definition of a variable in an equation?

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A variable is a symbol used to represent an unknown value in mathematical expressions.

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m = 21