Answer:
Explanation:
7(n + 4) = 21 divide both sides by 7
n + 4 = 3 subtract 4 from both sides
n + 4 - 4 = 3 - 4
n = -1
7(n+4) = 21
factor out the 7
7n + 28 = 21
subtract 28 from both sides
7n = -7
divide both sides by 7
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