exam Maths Puzzle Numerical Ability

Solve

5(2x-2)=40

I have no idea how to do this one at all please help.

Read Solution (Total 0)

exam Other Question

YOU ARE EARNING AN AVERAGE OF $46,500 AND WILL RETIRE IN 10 YEARS. IF YOU PUT 20% OF YOUR GROSS AVERAGE INCOME IN AN ORDINARY ANNUITY COMPOUNDED AT 7% ANNUALLY, WHAT WILL BE THE V What is the value of k for which the system:

(r^2)+(s^2)=t,
r+s+t=k

has exactly one solution (r,s,t)?