SOLUTION: You can buy used I line skates from your friend for 40$, or ou can rent some. Either way, you must rent safety equipment. How many hours must you skate for the cost of renting and

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Question 517038: You can buy used I line skates from your friend for 40$, or ou can rent some. Either way, you must rent safety equipment. How many hours must you skate for the cost of renting and buying skates to be the same?
Skates and safety equipment: 3.50$/hour
safety equipment 1.50$/hour
Found 2 solutions by josmiceli, JBarnum:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The key is:
Either way, you must rent safety equipment.
In words:
( $40 + safety rental) = ( skates and safety rental )
Let t = hours of rental
+40+%2B+1.5t+=+3.5t+
+2t+=+40+
+t+=+20+
After 20 hours of rental, the cost is the same

Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
Logical thinking:
well its $2 more per hour to rent skates and safety equipment so 40/2=20
so in 20 hrs you will have spent the same amount of money
.
.
Mathimatical way:
x= how many hours
40%2B%281.5x%29=3.5x subtract 1.5x from both sides
40=2x divide by 2
20=x