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3/x+1/y=7 or,3y+x=7 or,x=7-3y......................(1) 5/x -4/y=6 or,5y-4x=6 putting the value of x as 7-3y from (1) we have, 5y-(28-12y)=6 or,17y=6+28=34 or, y=34/17=2............(2) x=7-3y Putting the value of y as 2 from (2) we have, x=7-6=1 Ans: y=2 x=1