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11/4 = x/8.6 // - x/8.6
11/4-(x/8.6) = 0
11/4-0.11627907*x = 0
11/4-0.11627907*x = 0 // - 11/4
-0.11627907*x = -11/4 // : -0.11627907
x = -11/4/(-0.11627907)
x = 23.64999995
x = 23.64999995
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