Question

Resuelve l ecuación de primer grado
7(x + 5) - 2(x - 1) = 3(x + 7)

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Answer 1

$7(x + 5) - 2(x - 1) = 3(x + 7) \\ 7x + 35 - 2x + 2 = 3x + 21 \\ 5x + 37 = 3x + 21 \\ 5x - 3x = 21 - 37 \\ 2x = - 16 \\ x = \frac{ - 16}{2} \\ x = - 8$