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x in (-oo:+oo)
(5*x)/2-7 = 1/2 // - 1/2
(5*x)/2-(1/2)-7 = 0
(5*x)/2-1/2-7 = 0
5/2*x-15/2 = 0 // + 15/2
5/2*x = 15/2 // : 5/2
x = 15/2/5/2
x = 3
x = 3
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