Question

Решите уравнение:
$\frac{7x - 1}{12} - \frac{x + 1}{4} = \frac{2x + 5}{3}$
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Answer 1

$\frac{7x - 1}{12} - \frac{x + 1}{4} = \frac{2x + 5}{3} \: \: \: \: | \cdot12 \\ 7x - 1 - 3(x + 1) = 4(2x + 5) \\ 7x - 1 - 3x - 3 = 8x + 20 \\ 4x - 4 = 8x + 20 \\ 4x - 8x = 20 + 4 \\ - 4x = 24 \\ x = \frac{24}{ - 4} \\ \boxed{\bold{x = - 6}}$