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y in (-oo:+oo)
3*y-(8/12) = y/5 // - y/5
3*y-(y/5)-(8/12) = 0
3*y-(y/5)-2/3 = 0
14/5*y-2/3 = 0 // + 2/3
14/5*y = 2/3 // : 14/5
y = 2/3/14/5
y = 5/21
y = 5/21
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