Question

5(1-x)_2x+1=-3(2+x) sendo u =Q
$5( - 1 - x ) - 2x + 1 = - 3(2 + x)$
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Answer 1

Resposta:

$5 \times (1 - x) - 2x + 1 = - 3 \times (2 + x) \\ 5 - 5x - 2x + 1 = - 6 - 3x \\ 6 - 7x = - 6 - 3x \\ 6 - 7x + 6 + 3x = 0 \\ 12 - 4x = 0 \\ - 4x = - 12 \times ( - 1) \\ 4x = 12 \div (4) \\ x = 3$

$5 \times ( - 1 - x) - 2x + 1 = - 3 \times (2 + x) \\ - 5 - 5x - 2x + 1 = - 6 - 3x \\ - 4 - 7x = - 6 - 3x \\ - 4 - 7x + 6 + 3x = 0 \\ 2 - 4x = 0 \\ - 4x = - 2 \times ( - 1) \\ 4x = 2 \\ \\ x = \frac{2}{4} \div (2) \\ \\ x = \frac{1}{2}$