Answer:

Step-by-step explanation:
3x+15= 5x
8y-72= 9y
9a+18= 2a
3b-27= 9b
5c+40= 8c
6c+18= 3c
8c-8= c/1c
5x-10= 2x
2b-16= 8b
7c-35= 5c
Answer:
$21
Step-by-step explanation:
This can be easily solved by fraction 400/24=350/x
x=$21
I think division, at least that's how I wrote it in school