Answer:
x = 13
Explanation:
(x) + (x + 3) + (x - 2) + 3(x + 3) - 1 = 87
x + x + 3 + x - 2 + 3x + 9 - 1 = 87
6x + 9 = 87
6x = 87 - 9
6x = 78
x = 78/6
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