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w in (-oo:+oo)
6.6/2.4 = w/4.2 // - w/4.2
6.6/2.4-(w/4.2) = 0
6.6/2.4-0.23809524*w = 0
2.75-0.23809524*w = 0 // - 2.75
-0.23809524*w = -2.75 // : -0.23809524
w = -2.75/(-0.23809524)
w = 11.54999991
w = 11.54999991
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