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y in (-oo:+oo)
2*y-(7/5) = 25 // - 25
2*y-(7/5)-25 = 0
2*y-7/5-25 = 0
2*y-132/5 = 0 // + 132/5
2*y = 132/5 // : 2
y = 132/5/2
y = 66/5
y = 66/5
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