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(1/6)*(6*y+12)-8 = (-1/4)*(12*y-24) // - (-1/4)*(12*y-24)
(1/6)*(6*y+12)-((-1/4)*(12*y-24))-8 = 0
(1/6)*(6*y+12)+(1/4)*(12*y-24)-8 = 0
1/6*(6*y+12)+1/4*(12*y-24)-8 = 0
1/6*(6*y+12)+1/4*(12*y-24)-8 = 0
4*y-8-4 = 0
4*y-12 = 0
4*y-12 = 0
4*y-12 = 0 // + 12
4*y = 12 // : 4
y = 12/4
y = 3
y = 3
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