Question

(2X+3y=28) (X+y=3) me ajude

Answer 1

2x + 3y = 28
x + y = 3

* x = 3 - y

2 (3 - y) + 3y = 28
6 - 2y + 3y = 28
y = 28 - 6 → y = 22 ←

*x = 3 - 22 → x = -19 ←