Question

me ayudan con el me todo de sustitucion
3x+5y=15
2x-3y=-9

Answer 1

3x+5y=15
2x-3y=-9

9x+15y=45
10x-15y=-45

19x=0
x=0

2(0)-3y=-9
y=3
_______________
3(0)+5(3)=15
2(0)-3(3)=-9

15=15
-9=-9