Question

{[(x+40:5):2^2+2^3 x 3^2]:2^2+2^2 x 5+3^2}:5^2-2^0=1

Answer 1

{[(X+8):4+8x9]:4+4x5+9}:25-1=1
{[(X+8):4+72]:4+20+9}:25-1=1
{[(X+8):4+72]:4+20+9}:25=1+1 ⇒2
{[(X+8):4+72]:4+20+9}=2x25 ⇒50
[(X+8):4+72]:4+20=50-9 ⇒41
[(X+8):4+72]:4=41-20 ⇒21
[(X+8):4+72]=21x4 ⇒84
(X+8):4=84-72 ⇒12
(X+8)=12x4 ⇒48
X+8=48
X=48-8
X=40