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(1/4)*(8*y-12)-5 = (-1/8)*(8*y-32) // - (-1/8)*(8*y-32)
(1/4)*(8*y-12)-((-1/8)*(8*y-32))-5 = 0
(1/4)*(8*y-12)+(1/8)*(8*y-32)-5 = 0
1/4*(8*y-12)+1/8*(8*y-32)-5 = 0
1/4*(8*y-12)+1/8*(8*y-32)-5 = 0
3*y-7-5 = 0
3*y-12 = 0
3*y-12 = 0
3*y-12 = 0 // + 12
3*y = 12 // : 3
y = 12/3
y = 4
y = 4
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