Answer:
x=-2
y=5
Step-by-step explanation:
x+2y=8 equation-1
-x+3y=17 equation-2
5y=25
Both side divided 5,
y=5
Equation-1, y=5
x+2(5)=8
x+10=8
Both side -10
x+10-10=8-10
x=-2
Equation-2, y=5
-x+3(5)=17
-x+15=17
Both side -15
-x+15-15=17-15
-x=2
x=-2