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(1/5+5)*(1-(5*x))+x-((3*x)/5)+5 = 15/3 // - 15/3
(1/5+5)*(1-(5*x))+x-((3*x)/5)-(15/3)+5 = 0
(1/5+5)*(1-5*x)+x+(-3/5)*x-5+5 = 0
26/5*(1-5*x)+x+(-3*x)/5-5+5 = 0
(5*26/5*(1-5*x))/5+(5*x)/5+(-3*x)/5+(-5*5)/5+(5^2)/5 = 0
5*26/5*(1-5*x)+5*x-3*x-5*5+25 = 0
25-125*x-3*x-25+26 = 0
25-128*x-25+26 = 0
1-128*x+25 = 0
26-128*x = 0
(26-128*x)/5 = 0
(26-128*x)/5 = 0 // * 5
26-128*x = 0
26-128*x = 0 // - 26
-128*x = -26 // : -128
x = -26/(-128)
x = 13/64
x = 13/64
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