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x in (-oo:+oo)
(-6/13)*x = -37.2 // + 37.2
(-6/13)*x+37.2 = 0
37.2-6/13*x = 0 // - 37.2
-6/13*x = -37.2 // : -6/13
x = -37.2/(-6/13)
x = 80.60000027
x = 80.60000027
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