Answer:
y = -3
x = -2
Explanation:
2x - y = 17
y = x - 10
Adding these 2 equations:-
2x + y - y = 17 + x - 10
2x = x + 7
x = 7
Now substitute for x in the first equation:-
2(7) - y = 17
14 - 17 = y
y = -3 (answer)
Last equation:-
x + 3y = 16
4x - 5y = -38
Now multiply first equation by 5 and the second by 3:-
5x + 15y = 80
12x - 15y = -114 Adding:-
17x = -34
x = -2 (answer)