solve
1/x - 4/y =2 & 1/x - 3/y =9
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LET 1/X = A AND 1/Y = B
A - 4B = 2
A + 3B = 9
-7B = -7
7B = 7
B=1
1/Y = 1
Y=1
A - 4B = 2
A - 4 = 2
A=6
1/X= 6
X=6
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