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x in (-oo:+oo)
(x-2)/2 = 7 // - 7
(x-2)/2-7 = 0
(x-2)/2+(-7*2)/2 = 0
x-7*2-2 = 0
x-16 = 0
(x-16)/2 = 0
(x-16)/2 = 0 // * 2
x-16 = 0
x-16 = 0 // + 16
x = 16
x = 16
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