Sagot :
2x-3y=1
x+5y=2
x=2-5y
2*(2-5y)-3y=1
4-10y-3y=1
4-13y=1
-13y=1
y=1/-13
x=2-5y
x=2-5*(1/-13)
x=2- (2/-13)
x=-24/-13
x+5y=2
x=2-5y
2*(2-5y)-3y=1
4-10y-3y=1
4-13y=1
-13y=1
y=1/-13
x=2-5y
x=2-5*(1/-13)
x=2- (2/-13)
x=-24/-13