And the x = 70

Fehmi is a high school student who has been investigating the possibility of mowing lawns for a summer job. He has a couple of friends he thinks he could hire on an hourly basis per job. The equipment, including two new lawnmowers and weed-caters, would cost him (X*10) TL, and he estimates her cost per lawn, based on the time required to pay her friends to mow an average residential lawn (and not including her own labor) and gas for driving to the jobs and mowing, would be about (X/3) TL. a. If he charges customers X TL per lawn, how many lawns would he need to mow to break-even? b. He has 8 weeks available to mow lawns before school starts again, and he estimates that she can get enough customers to mow at least three lawns per day, 6 days per week. How much money can she expect to make over the summer? c. He believes he can get more business if he lowers her price per lawn. If he lowers his price to (X72) TL per lawn and increases her number of jobs to four per day (which is about all he can handle anyway), should be change his decision