the spreadsheet shows the monthly revenue and expenses for a new business.use the models to predictt the month in which revenue will equal expense.
month revenue expenses
jan 4000 22,000
feb 9000 24,000
mar 13,000 25,000
apr 16,000 27,000
may 21,000 30,000
Would someone please help and explain how to figure this out

Question

the spreadsheet shows the monthly revenue and expenses for a new business.use the models to predictt the month in which revenue will equal expense. 
month  revenue  expenses
jan     4000   22,000
feb     9000   24,000
mar   13,000   25,000
apr    16,000   27,000
may   21,000  30,000
Would someone please help and explain how to figure this out

anonymous · Answer

r=4100x-300
e=1900x-19900
oct.
4100x=300
1900X+19900
sept.
r=4100x+300
e=1900x+19900
aug.
r=4100x-300
e=1900+19900
sept.

Not sure how to figure the one that is correct,please help