The solution to this would be x=2, y=-2
If you round up the 27.64 to 28 and then multiply it bye 3 it eaquals 84
Lets break this down step by step.
4+4+4+4=16 lawns a week.
16+16+16+16=64 lawns a month.
64+64+64+64=256 lawns a year.
Then we take 256 x $25 to get $6,400 last year.
6,400<---Answer
-Seth