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x in (-oo:+oo)
(1/4)*(2-x) = 9 // - 9
(1/4)*(2-x)-9 = 0
1/4*(2-x)-9 = 0
1/4*(2-x)-9 = 0
-1/4*x-17/2 = 0
-1/4*x-17/2 = 0
-1/4*x-17/2 = 0 // + 17/2
-1/4*x = 17/2 // : -1/4
x = 17/2/(-1/4)
x = -34
x = -34
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