Finding the ratio x : y given algebraic equation ax + by = cx + dy

Lew W.S.
The following exercises involve equations relating x and y and your task is to find the ratio x : y. Input the values of x and y using the blue keyboard buttons. Work your solutions on a piece of paper before you key in your answer! There are 5 levels of difficulty. If you get 4 questions right for each level you will proceed on to the next level. See if you can complete all five levels, ie. 20 correct questions in as little number of questions generated as possible.