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x in (-oo:+oo)
(1/2)*(x-2) = 8 // - 8
(1/2)*(x-2)-8 = 0
1/2*(x-2)-8 = 0
1/2*(x-2)-8 = 0
1/2*x-9 = 0
1/2*x-9 = 0
1/2*x-9 = 0 // + 9
1/2*x = 9 // : 1/2
x = 9/1/2
x = 18
x = 18
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