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x-y=2
-------- +
2x=10
x=5
5+y=8
y=3
4x+11y=1
2x+3y=3 /*(-2)
4x+11y=1
-4x-6y=-6
------------ +
5y=-5
y=-1
2x-3=3
2x=3+3 /:2
x=3
x-y=2
x=5
y=3
B
4x+11y=1
-4x-6y= -6
5y= -5
y= -1
4x+11y(-1)=1
y= -1
4x=10
y= -1
x=0,4
y= -1