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f in (-oo:+oo)
7.2/0.3 = f/6.2 // - f/6.2
7.2/0.3-(f/6.2) = 0
7.2/0.3-0.16129032*f = 0
24-0.16129032*f = 0 // - 24
-0.16129032*f = -24 // : -0.16129032
f = -24/(-0.16129032)
f = 148.80000238
f = 148.80000238
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