it does'nt have any angle

Very easy, see $X=a+b+c+d+3=\frac { X }{ 5 } +\frac { X }{ 8 } +\frac { X }{ 6 } +\frac { X }{ 2 } +3$ which is $\frac { 24X+15X+20X+60X }{ 120 } +3=\frac { 119X }{ 120 } +3=X$ . Multiplying the equation by $120$ is $119X+360=120X$ so $X=\boxed { 360 }$ .

$x = 5a = 8b = 6c = 2d$ $=> a=2d/5; b=d/4; c=d/3$ $=> (2d/5) + (d/4) + (d/3) + d + 3 = 2d$ $=> d=180 => x = 2d = 360$

Substituting values in given equation we get 120 X =119X +360 that is X =360 Ans K.K.GARG,India

put the values of a,b,c and d in the given equation.after solving you get x=360

it's simple plus and minus

x = x(1/5+1/8+1/6+1/2) + 3

x = 119x/120 + 3

x = 119x + 360 / 120

120x = 119x + 360

120x - 119x = 360

x = 360

X/5 + X/8 + X/6 + X/2 = 238X/240 + 3 = (238X+ 720)/240

X = (238X+ 720)/240

Multiplying the obove equation we obtain :

240X = 238X+ 720

then solving for X we obtain X = 360

gandu question

X=a+b+c+d+3 then X= X(1\5+ 1\8+ 1\6+ 1\2)+3, X= X(119\120)+ 3 multiplying by 120 then 120X= 118X+ 360 finally X=360

You just need to add up the values of a,b,c,d in terms of x and simplify.