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5.8 = x/2.2 // - x/2.2
5.8-(x/2.2) = 0
5.8-0.45454545*x = 0
5.8-0.45454545*x = 0 // - 5.8
-0.45454545*x = -5.8 // : -0.45454545
x = -5.8/(-0.45454545)
x = 12.76000013
x = 12.76000013
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