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(1/7)*(2*x+3)-((1/8)*(5*x+1)) = 6-((5*x)/14) // - 6-((5*x)/14)
(1/7)*(2*x+3)-((1/8)*(5*x+1))+(5*x)/14-6 = 0
(1/7)*(2*x+3)+(-1/8)*(5*x+1)+(5*x)/14-6 = 0
1/7*(2*x+3)-1/8*(5*x+1)+(5*x)/14-6 = 0
(1/7*14*(2*x+3))/14+(-1/8*14*(5*x+1))/14+(5*x)/14+(-6*14)/14 = 0
1/7*14*(2*x+3)-1/8*14*(5*x+1)+5*x-6*14 = 0
5*x-19/4*x-84+17/4 = 0
1/4*x-84+17/4 = 0
1/4*x-319/4 = 0
(1/4*x-319/4)/14 = 0
(1/4*x-319/4)/14 = 0 // * 14
1/4*x-319/4 = 0
1/4*x-319/4 = 0 // + 319/4
1/4*x = 319/4 // : 1/4
x = 319/4/1/4
x = 319
x = 319
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