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01-11-2018
Mathematics

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6n+9=-3n-21-6
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01-11-2018

6n + 9 = -3n -21 -6

6n + 9 = -3n -27

+3n +3n

9n +9 = -27

-9 -9

9n = -36

Divide by 9 on both sides

n = -4

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