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Answer:
1/5x + 1/6y =12
LCM = 30xy
(6y+5x)/30xy =12
6y+5x=360xy --equation 1
1/3x - 3/7y =8
LCM = 21xy
(7y-9x)/21xy=8
7y-9x=168xy --equation 2
From 1 and 2 equation
6y+5x=360xy ] * 7
7y-9x=168xy ] * 6
42y+35x=2520xy
42y-54x=1008xy
- + -
0 + 89x = 1512
x = 1512/89
Put x in eq 1
y = 4245/33
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