Question

3-2(x+3)=x-18
$3 - 2(x + 3) = x - 18$
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Answer 1

$3 - 2(x + 3) = x - 18 \\ 3 - 2x - 6 = x - 18 \\ 3 - 6 + 18 = x + 2x \\ 15 = 3x \\ \frac{15}{3} = x$

$x = 5$

Espero ter ajudado ^^