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A in (-oo:+oo)
A/3.2 = 0.8 // - 0.8
A/3.2-0.8 = 0
0.3125*A-0.8 = 0 // + 0.8
0.3125*A = 0.8 // : 0.3125
A = 0.8/0.3125
A = 2.56
A = 2.56
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