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x in (-oo:+oo)
(1/4)*(x-8) = 30 // - 30
(1/4)*(x-8)-30 = 0
1/4*(x-8)-30 = 0
1/4*(x-8)-30 = 0
1/4*x-32 = 0
1/4*x-32 = 0
1/4*x-32 = 0 // + 32
1/4*x = 32 // : 1/4
x = 32/1/4
x = 128
x = 128
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