Write out the equations and solve. It is possible for one to have no solution.

1. (square root of X)  equals 7
2. (square root of (X – 2)) plus 5 equals 9
3. 4 times the (square root of X) minus 1 equals 23
4. (square root of X) times five equals 3
5. (square root of (20 – X)) equals X

 

Check your answers when you have finished them all.

Answers: (49, 18, 36, no solution, 4)

 

(edited from source)