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187.51 = (2/5)*(x-20)+125.25 // - (2/5)*(x-20)+125.25
187.51-((2/5)*(x-20))-125.25 = 0
(-2/5)*(x-20)-125.25+187.51 = 0
187.51-2/5*(x-20)-125.25 = 0
187.51-2/5*(x-20)-125.25 = 0
187.51-2/5*x-117.25 = 0
70.26-2/5*x = 0
70.26-2/5*x = 0
70.26-2/5*x = 0 // - 70.26
-2/5*x = -70.26 // : -2/5
x = -70.26/(-2/5)
x = 175.65
x = 175.65
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