Solve x^3 - 25 = 103 - x^3

First, bring -25 to the other side: +25 which gives

x³ = 128 - x³

Now, same with - x³ ( + x³ for both sides), giving

2x³ = 128

128 / 2 gives the value of 64 for x³

In order to find the value for x, now ³√ 64

Therefore, x = 4