Maria wants to save money for a car. Over the summer she had a part-time job and was able to buy her own school clothes and then save the rest. She has to decided to start saving the same amount every month from her allowance. Write an equation to represent the situation.

There is no association.

Dcups i think

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.