Question

Помогите решить уровнение
2x-3y=21

Answer 1

$2x - 3y = 21 \\ \\ 2x = 21 + 3y \\ \\ \\ x = \frac{21}{2} + \frac{3y}{2} \\ \\ \\ x = 10.5 + 1.5y$

$2x - 3y = 21 \\ \\ - 3y = 21 - 2x \\ \\ 3y = - 21 + 2x \\ \\ 3y = 2x - 21 \\ \\ \\ y = \frac{2}{3} x - \frac{21}{3} \\ \\ \\ y = \frac{2}{3} x - 7.$