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x in (-oo:+oo)
12*(x-(1/2))-(4*x) = 26.8 // - 26.8
12*(x-(1/2))-(4*x)-26.8 = 0
12*(x-1/2)-4*x-26.8 = 0
12*(x-1/2)-4*x-26.8 = 0
8*x-26.8-6 = 0
8*x-32.8 = 0
8*x-32.8 = 0
8*x-32.8 = 0 // + 32.8
8*x = 32.8 // : 8
x = 32.8/8
x = 4.1
x = 4.1
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