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x in (-oo:+oo)
(1/2)*(x-0.3) = 1.55 // - 1.55
(1/2)*(x-0.3)-1.55 = 0
1/2*(x-0.3)-1.55 = 0
1/2*(x-0.3)-1.55 = 0
1/2*x-1.7 = 0
1/2*x-1.7 = 0
1/2*x-1.7 = 0 // + 1.7
1/2*x = 1.7 // : 1/2
x = 1.7/1/2
x = 3.4
x = 3.4
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