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x in (-oo:+oo)
(1/4)*(x-8) = 7 // - 7
(1/4)*(x-8)-7 = 0
1/4*(x-8)-7 = 0
1/4*(x-8)-7 = 0
1/4*x-9 = 0
1/4*x-9 = 0
1/4*x-9 = 0 // + 9
1/4*x = 9 // : 1/4
x = 9/1/4
x = 36
x = 36
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