17.75-14.91=2.84. so the discount was $2.84
Answer: 18
Explanation:
24+1-7
Answer:
x = -1, y = 1
Step-by-step explanation:
Multiply the top equation by 2:
![2x - 2y = - 4](https://tex.z-dn.net/?f=2x%20-%202y%20%3D%20%20-%204)
Leaving the bottom equation unchanged, add the two resulting equations to eliminate y, obtaining:
![9x = - 9](https://tex.z-dn.net/?f=9x%20%3D%20%20-%209)
Solve this for x, and then substitute this value of x into the bottom equation. Finally, solve for y.
![x = - 1](https://tex.z-dn.net/?f=x%20%3D%20%20-%201)
![7( - 1) + 2y = - 5](https://tex.z-dn.net/?f=7%28%20-%201%29%20%2B%202y%20%3D%20%20-%205)
![- 7 + 2y = - 5](https://tex.z-dn.net/?f=%20-%207%20%2B%202y%20%3D%20%20-%205)
![2y = 2](https://tex.z-dn.net/?f=2y%20%3D%202)
![y = 1](https://tex.z-dn.net/?f=y%20%3D%201)
Answer:
600 and 12
Step-by-step explanation: