Решите систему уравнение

10x+13y=-193 2x+5y=1 6x+5y=-8

4x-5y=35 4x+3y=9 4x+7y=2

1) 10x+13y=-193

4x-5y=35

5y=4x-35 = > y=4/5x-7

10x+10/4x-91=-193

40x+10x-364=-772

50x=-408

x=-8.16

y=-13.528

2) 2x+5y=1

4x+3y=9

2x=1-5y = > x=1/2-5/2y

2-10y+3y=9

-7y=7

y=-1

x=3

3) 6x+5y=-8

4x+7y=2

4x=2-7y x=> 1/2-7/2y

3-21y+5y=-8

-16y=-11

y=0.6875

x=-19.0625