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(2*y)/3-45 = 25/2-y // - 25/2-y
(2*y)/3+y-(25/2)-45 = 0
(2*y)/3+y-25/2-45 = 0
5/3*y-115/2 = 0 // + 115/2
5/3*y = 115/2 // : 5/3
y = 115/2/5/3
y = 69/2
y = 69/2
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