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x in (-oo:+oo)
(1.5*x)/2-4 = 2 // - 2
(1.5*x)/2-4-2 = 0
0.75*x-6 = 0 // + 6
0.75*x = 6 // : 0.75
x = 6/0.75
x = 8
x = 8
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