You have a total of 49 dimes and quarters. you have 7 more quarters than dimes. which system of equations can you use to find the number x of quarters and number y of dimes you have? use the system to determine how much money you have in quarters and dimes.

21 dimes and 28 quarters

Step-by-step explanation:

To determine the number of quarters and dimes that you have, you can write the following equations:

x+y= 49 (1)

y= 7+x (2)

x= number of dimes

y= number of quarters

You have to replace 2 in 1:

x+(7+x)= 49

2x= 49-7

x= 42/2= 21

y= 7+21

y= 28

You have 21 dimes and 28 quarters.

you already gave the answer

step-by-step explanation:

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right