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y in (-oo:+oo)
(3*y)/10-2 = y/5+3 // - y/5+3
(3*y)/10-(y/5)-3-2 = 0
1/10*y-5 = 0 // + 5
1/10*y = 5 // : 1/10
y = 5/1/10
y = 50
y = 50
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