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8x-5y=-1
2x=4-3y
8x-5y=-1
x=(4-3y)/2
8(4-3y)/2-5y=-1
x=(4-3y)/2
16-12y-5y=-1
x=(4-3y)/2
-17y=-17
x=(4-3y)/2
y=1
x=1/2
y=1
2x=4-3y
x=2-1,5y
8x-5y=-1
8(2-1,5y)-5y=-1
16-12y-5y=-1
16-17y=-1
-17y=-17
y=1
x=2-1,5
x=0,5