Question

Решите систему уравнений пж:
6x-7y=40
2x-5y=8

Answer 1

$6x-7y=40 \\ 2x-5y=8 \ \textgreater \ \ \textgreater \ x=4+2,5y \\ \\ 6*(4+2,5y)-7y=40 \\ 24+15y-7y=40 \\ 8y=16 \\ y=2 \\ x=4+2,5*2 \\ x=9$

Answer 2

6x-7y=40
2x-5y=8
2x=8+5y
x=4+2,5
24+15y-7y=40
8y=40-24
8y=16
y=2
2x=10+8
x=9