4x+(x-y)/8=17
2y+x-(5y+2)/3=2
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4x+ x-y=17×8
2y+x-5y+2=2×3
5x-y=136(1)
-3y+x=6(2)
5x-y=136
x-3y=6
- - +
_______
2y+x-5y+2=2×3
5x-y=136(1)
-3y+x=6(2)
5x-y=136
x-3y=6
- - +
_______
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