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17.15 = (100*(34.4-x))/200 // - (100*(34.4-x))/200
17.15-((100*(34.4-x))/200) = 0
(-1/2)*(34.4-x)+17.15 = 0
17.15-1/2*(34.4-x) = 0
17.15-1/2*(34.4-x) = 0
1/2*x-0.05 = 0
1/2*x-0.05 = 0
1/2*x-0.05 = 0 // + 0.05
1/2*x = 0.05 // : 1/2
x = 0.05/1/2
x = 0.1
x = 0.1
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