Question 123670
Solve for y 
3(y+7)/7y - (4y-7)/6 = (7y+10)/3y - 2(7y-1)/21
Multiply thru by 42y to get rid of the denominators:

18(y+7) - 7y(4y-7) = 14(7y+10) - 4y(7y-1)
18y+ 126 -28y^2 + 49y = 98y+140 -28y^2+4y
67y+126 = 102y+140
26 = 35y
y = 26/35
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Cheers,
Stan H.