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y in (-oo:+oo)
y/120 = 25/125 // - 25/125
y/120-(25/125) = 0
y/120-1/5 = 0
1/120*y-1/5 = 0 // + 1/5
1/120*y = 1/5 // : 1/120
y = 1/5/1/120
y = 24
y = 24
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