Question

Asking for help again

Answer 1

Answer: D. (7, 0)

Explanation:

1. 
   `4x+9y=28\\-4x-y=-28`
2. The xs can already cancel since 4x is positive for the first equation, but negative on the second.
3. Add the equations together
4. 8y=0
5. Divide both sides by 8
6. y=0
7. Plug y into one of the equations
8. 4x + 9(0)=28
9. Distribute 0
10. 4x=28
11. Divide both sides by 4
12. x= 7

So your answer is (7, 0)