Question

Найдите корень уравнения: 1,5(8x + 20) = -3(6x+15)

Answer 1

12x+30= -18x-45; 12x+18x= -45-30; 30x= -75; x=(-75) / 30= -2,5. Ответ: x= -2,5.

Answer 2

$1,5(8x + 20) = -3(6x+15) \ \ (8x + 20) = -2(6x+15) \ \ (8x + 20) = -12x-30 \ \ 8x +12x= -20-30 \ \ 20x = -50 \ \ x = -2,5$