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5.5/45 = x/20 // - x/20
5.5/45-(x/20) = 0
0.12222222-1/20*x = 0 // - 0.12222222
-1/20*x = -0.12222222 // : -1/20
x = -0.12222222/(-1/20)
x = 2.4444444
x = 2.4444444
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