Question

Решите уравнение
7*(3+x)-5x=3x-56

Answer 1

Ответ:

21+7x-5x=3x-56

77-x=0

x=77

Answer 2

$7 \times (3 + x) - 5x = 3x - 56 \\ 21 + 7x - 5x = 3x - 56 \\ 21 + 2x = 3x - 56 \\ 2x - 3x = - 56 - 21 \\ - x = - 77 \\ \textbf{ \textit{x = 77}}$