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0.05*(x/2)+0.04*(x/3)+0.045*((3*x)/10) = 550 // - 550
0.05*(x/2)+0.04*(x/3)+0.045*((3*x)/10)-550 = 0
0.0518333332*x-550 = 0 // + 550
0.0518333332*x = 550 // : 0.0518333332
x = 550/0.0518333332
x = 10610.93250318
x = 10610.93250318
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