[input]4(14-x)/3 = x[/input]
4(14-x)/3 = x
4*(14-x)/3 = x
4/3*(14-x) = x
4/3*14 - 4x/3 = x |+4x/3
4/3*14 = x+4x/3
4/3*14 = 1x+4x/3
4/3*14 = x*(1+4/3) | /(1+4/3)
(4/3*14)/(1+4/3) = x
(56/3)/(3/3+4/3) = x
(56/3)/(7/3) = x
(56/3)*(3/7) = x
56/7 = x
8 = x
x= 8
