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y in (-oo:+oo)
3*(y-(3/2))-y = 7*(5-y) // - 7*(5-y)
3*(y-(3/2))-(7*(5-y))-y = 0
3*(y-3/2)-7*(5-y)-y = 0
3*(y-3/2)-7*(5-y)-y = 0
10*y-y-79/2 = 0
9*y-79/2 = 0
9*y-79/2 = 0
9*y-79/2 = 0 // + 79/2
9*y = 79/2 // : 9
y = 79/2/9
y = 79/18
y = 79/18
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