(x-3)³-(5-x)³=0 (x-4)³+1=0

Question

(x-3)³-(5-x)³=0 (x-4)³+1=0

Answer 1

1) (x-3)³-(5-x)³=0    
(x - 3)^3 = (5-x)^3
x-3 = 5-x
2x = 8
x = 8/2 = 4

2)  (x-4)³+1=0
(x-4)^3 = -1
x-4 = ∛(-1)
x-4 = -1
x = 3