A very good day everyone. I am urgently requesting for your help for this taxing mathematics questions, all relating to algebra (changing the subject of a formula).

If you could help me to explain those sums I would be very gratified. So here they are:

In each of the following cases, rewrite the equation such that the letter in the square brackets is the subject of a given formula.

1.[u]

2.[z]

3.[g]

4.[u]

5.[x]