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x=1 y=6
m=-5 n=-6
x=2 y=3
x=4 y=5
x=-4/11 y=87/11
x=3 y=5
x=3 y=3/2
a-2b=-8 -> (9-b)/2-2b=-8 ->b=5 entonces a= (9-5)/2=2
x-y=-5 ->x=-5+y
3x+2y=15 -> 3(-5+y)+2y=15 -> y= 6 entonces x=-5+6=1
2m+2n=-22 -> m=(-22-2n)/2
8m-12n=32 -> 8((-22-2n)/2)-12n=32 -> n=-6 entonces m=(-22-2(-6))/2=5/3 y asi sigues con los demas