Question

$5(x + 2) + 7(x - 1) = 39$
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Answer 1

Step-by-step explanation:

5x+10+7x-7=39

12x+3=39

12x=39-3

12x=36

x=36/12

x=3

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Answer 2

$5x + 10+ 7x - 7 = 39 \\ 12x + 3 = 39 \\ x = \frac{39 - 3}{12} \\ x = 3$