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x in (-oo:+oo)
(25/12)*x = 25/4 // - 25/4
(25/12)*x-(25/4) = 0
(25/12)*x-25/4 = 0
25/12*x-25/4 = 0 // + 25/4
25/12*x = 25/4 // : 25/12
x = 25/4/25/12
x = 3
x = 3
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