I think the problem is
2X+20=400
You just have to answer I think X and X equals that two numbers I’m not 100% sure but I’m trying to help
Answer: Plug y into the bottom equation
Step-by-step explanation:
It’s simple! You are given the value of y and the easiest step would just be to plug y in.
Hope this helps!
7/63 can be simplified down to 1/9 because if you were to multiply 7 by 9 you would get 63? or an easier way to do it would be to divide 63 by 7