Unit 3A Test (Pre-Algebra)

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m = -18

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Translate the sentence: 'three times a number subtracted from ten is twenty'.

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10 - 3n = 20

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x = -5

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Infinitely many solutions

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If Sarah is 8 years younger than her sister Grace and Sarah is 32 years old, how old is Grace?

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Grace is 40 years old.

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What is the definition of a variable in algebra?

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A symbol used to represent an unknown value.

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What does it mean to solve an equation?

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To find the value of the variable that makes the equation true.

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What is the distributive property in algebra?

Back

a(b + c) = ab + ac.

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Back

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x = 7.