Question

a) 2x - 3 (x - 1) = 8 - 4x

b)
$\frac{8x - 1}{2} - 2x = 3$
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Answer 1

Resposta:

$2x - 3 \times (x - 1) = 8 - 4x \\ 2x - 3x + 3 = 8 - 4x \\ - x + 3 = 8 - 4x \\ - x + 3 - 8 + 4x = 0 \\ 3x - 5 = 0 \\ 3x = 5 \\ \\ x = \frac{5}{3}$

$\frac{8x - 1}{2} - 2x = 3 \\ \\ \frac{8x - 1 - 4x}{2} = 3 \\ \\ \frac{4x - 1}{2} = 3 \\ \\ 4x - 1 = 6 \\ 4x - 1 - 6 = 0 \\ 4x - 7 = 0 \\ 4x = 7 \\ \\ x = \frac{7}{4}$