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(3/5)*((9/4)*a-(5/2))-((1/2)*((11/5)*a+14/4)) = 0
(3/5)*((9/4)*a-5/2)+(-1/2)*((11/5)*a+14/4) = 0
3/5*(9/4*a-5/2)-1/2*(11/5*a+7/2) = 0
3/5*(9/4*a-5/2)-1/2*(11/5*a+7/2) = 0
1/4*a-13/4 = 0
1/4*a-13/4 = 0
1/4*a-13/4 = 0 // + 13/4
1/4*a = 13/4 // : 1/4
a = 13/4/1/4
a = 13
a = 13
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