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0.42 = (66-x)/4 // - (66-x)/4
0.42-((66-x)/4) = 0
(-1*(66-x))/4+0.42 = 0
(-1*(66-x))/4+(0.42*4)/4 = 0
0.42*4-1*(66-x) = 0
x-64.32 = 0
(x-64.32)/4 = 0
(x-64.32)/4 = 0 // * 4
x-64.32 = 0
x-64.32 = 0 // + 64.32
x = 64.32
x = 64.32
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