Kk tolong jawabnya please

y = x - 5
x + 2y = 20

y = x - 5 》x - y = 5
Eliminasi x
x - y = 5 |×1 | x - y = 5
x + 2y = 20|×1 | x + 2y = 20
_________-
-3y = -15
y = 5

Eliminasi y
x - y = 5 |×2 | 2x - 2y = 10
x + 2y = 20|×-1 | -x - 2y = -20
___________-
3x = 30
x = 10
Jadi, HP {10,5}