Question

Найдите решение систем уравнений:
No1
1) (х – 2y = 4
3х + 5y = – 21
2) (x — Зу = 5
7х + 4у = - 15
3) (y+ 6x = 1
8x — Зу = 23
4) ( y + 4x = 3
(7x — 2y = 39
5) (x — 4y = 6
2х + 7y = — 78
6) (y+ 9x = 2
1 6x – 5y = 41

Answer 1

1) (х,у)=(-11,-2)
2) (х,у)=(-1,-2)
3) (х,у)=(12/13,-59/13)
4) (х,у)=(3,-9)
5) (х,у)=(-24,-15/2)
6) (х,у)=(1,-7)