If 17x +12y=65, 12x+17y=25, Then find the value x-y
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Answer:
17x + 12y = 65
17x=65 - 12y
x =(65-12y)/17
12x + 17y =25
12(65-12y)/17 +17y=25
780-144y/204+17y=25
780-144y+3468y=25x204
3324y=5100-780=4320
y=4320/3324=360/277
x=(65-12x360/277)/17
=839.8
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