Question

решите систему уравнений {x-y=2 {2x-3y=-1

Answer 1

x=y+2
2x-3y=-1

x=y+2
2y+4-3y=-1

y=5
x=7

Answer 2

спасибо!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!