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a in (-oo:+oo)
7.02-a/8.06 = 18.4 // - 18.4
7.02-a/8.06-18.4 = 0
-0.12406948*a-11.38 = 0 // + 11.38
-0.12406948*a = 11.38 // : -0.12406948
a = 11.38/(-0.12406948)
a = -91.72279919
a = -91.72279919
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