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x in (-oo:+oo)
((x-3)^1)/2 = 7 // - 7
((x-3)^1)/2-7 = 0
(x-3)/2-7 = 0
(x-3)/2+(-7*2)/2 = 0
x-7*2-3 = 0
x-17 = 0
(x-17)/2 = 0
(x-17)/2 = 0 // * 2
x-17 = 0
x-17 = 0 // + 17
x = 17
x = 17
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