exam Maths Puzzle Numerical Ability

If x-y=6 and 3x(squared)+3xy-6y(squared)=60, then 9x+18y=?

Read Solution (Total 0)

exam Other Question

Dear sir.
My homework is quite hard for me so if you can help me i will be very grateful....
I have got to find the pairs e.g 4 times b = 4b but what is 2(x-1) and 4 times ( x-1) Translated to an algebraic expression the sum of a and 7 times b is
a+7b

true or false?