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The sum of twice a number and 7 less than the number is the same as the difference between negative 31 and the number what is the number?

Anonymous

∙ 15y ago

Updated: 9/18/2023

2n + (n - 7) = -31 - n

3n - 7 = -31 - n

3n + n + 7 - 7 = -31 + 7 + n - n

4n = -24

4n/4 = -24/4

n = -6

Check:

2n + (n - 7) = -31 - n

2(-6) + [(-6) - 7) =? -31 - (-6)

-12 + [-6 + (-7)] =? -31 + 6

-12 + (-13) =? -25

-25 = -25 True

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∙ 15y ago

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