Write an equation to represent each diagram. Then use your equation to solve for the unknown value. A B C D W 12 11 13 A: x= B: y = C: z= D:w= (The fractions shown in the diagram are 13 and 3%) 6 10 2 11/4 9/5 5​

D. i think it is the savings

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.