book Maths Puzzle Numerical Ability

List the factors of the number 27.

Read Solution (Total 0)

book Other Question

I am having trouble simplifying. I know it sounds silly but I have never seen this one or dont remember it. I thought that expanding the problem and elimination would be the answe I am having diffuculties sloving this eqauation with substitution
6x-4y=10
y=3x-3