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5/9 = x/5.4 // - x/5.4
5/9-(x/5.4) = 0
5/9-0.18518519*x = 0
5/9-0.18518519*x = 0 // - 5/9
-0.18518519*x = -5/9 // : -0.18518519
x = -5/9/(-0.18518519)
x = 2.99999995
x = 2.99999995
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