Casey is deciding which of two landscapers to hire. each landscaper charges an hourly rate plus a fee for each job.

casey correctly wrote and solved a system of linear equations by substitution. in his work, he substituted an expression for one variable and solved for the other. this resulted in the equation 5 = 20. what can casey conclude?

a. one landscaper charges $20 for 5 hours of work.
b. one landscaper’s hourly rate is $15 lower than the other landscaper’s.
c. both landscapers charge the same hourly rate and the same fee per job.
d. both landscapers charge the same hourly rate.