book Maths Puzzle Numerical Ability

i need help on this Problem:work must be shown.

2=x/5-2

Read Solution (Total 0)

book Other Question

2 log(x+2)+log4 = log x + 4 log3 I need this answer quickly please:
You have 2 hourglasses-a 4 min. hourglass and a 7 min. hourglass. You want to measure 9 min. How do you do it?
Thanks