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(6*(y-9))/5 = -2*y // + -2*y
(6*(y-9))/5-(-2*y) = 0
(6*(y-9))/5+2*y = 0
(6*(y-9))/5+(2*5*y)/5 = 0
6*(y-9)+2*5*y = 0
16*y-54 = 0
(16*y-54)/5 = 0
(16*y-54)/5 = 0 // * 5
16*y-54 = 0
16*y-54 = 0 // + 54
16*y = 54 // : 16
y = 54/16
y = 27/8
y = 27/8
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