Question

50:{34+2+[10-2x(6-a:6)+6]}+3=4

Answer 1

 50:{34+2+[10-2x(6-a:6)+6]}+3=4 =>

50:[30+2+(10-12+2a/6+6)]=1=>

30+2-2+2a/6+6=50=>

2a/6=50-36=>2a=14*6=> a=14*6/2=>a=42

Answer 2

Salut!
   Am calculat(daca doresti fa verificarea). In egalitatea de mai sus, a=30.