Question

Solve: 21=3(8+n)
(showing steps)

Answer 1

Your answer !!

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$21 = 3 ( 8 + n ) \\ \\ 21 = 24 + 3n \\ \\ 21 - 24 = 3n \\ \\ - 3 = 3n \\ \\ n = \frac{3}{-3} \\ \\ n = - 1$

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Answer 2

Let n be X

$21 = (8 + x)3 \\ 21 = 24 + 3x \\ - 3 = 3x \\ x = - 1$