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8-(x/3) = (6*(x+1))/7 // - (6*(x+1))/7
8-((6*(x+1))/7)-(x/3) = 0
(-6/7)*(x+1)-(x/3)+8 = 0
8-6/7*(x+1)-x/3 = 0
(-6/7*3*(x+1))/3-x/3+(3*8)/3 = 0
3*8-6/7*3*(x+1)-x = 0
24-25/7*x-18/7 = 0
150/7-25/7*x = 0
(150/7-25/7*x)/3 = 0
(150/7-25/7*x)/3 = 0 // * 3
150/7-25/7*x = 0
150/7-25/7*x = 0 // - 150/7
-25/7*x = -150/7 // : -25/7
x = -150/7/(-25/7)
x = 6
x = 6
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