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A in (-oo:+oo)
7.2-A/8.06 = 18.4 // - 18.4
7.2-A/8.06-18.4 = 0
-0.12406948*A-11.2 = 0 // + 11.2
-0.12406948*A = 11.2 // : -0.12406948
A = 11.2/(-0.12406948)
A = -90.27199921
A = -90.27199921
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