Question

18-6(3х+7)-2(4х-1)=7х

Answer 1

$18 - 6(3x + 7) - 2(4x - 1) = 7x \\ 18 - 18x - 42 - 8x + 2 = 7x \\ - 26x - 7x = 22 \\ - 33x = 22 \\ x = - \frac{22}{33} \\ x = - \frac{2}{3}$