Answer:
2hours
Step-by-step explanation:
Step one:
given data
Rental #1
charges a flat fee of $1 with an additional cost of $2 for every hour
let the number of hours be x
the total charge
y= 1+2x-------------1
Rental #2
charges a flat fee of $3 with an additional cost of $1 for every hour.
let the number of hours be x
the total charge
y= 3+1x-------------2
equate 1 and 2
1+2x=3+x
collect like terms
1-3=x-2x
-2=-x
x=2hours
