Geometry (comp sup angles)

Given :

∠1 is comp. to ∠2, ∠3 is comp. to ∠2

m∠1 = 8-x^2

m∠4 = x+80

m∠3= 8-3x

is ∠3 comp. to ∠4?

(Show your work please) 

(Here's the diagram)