Answer 6 hours
Reason
7x + 9.50 = 55
-9.50. -9.50 subtract from both sides
_____________
7x = 45.50
Divide both sides by 7 to isolate x
X = 6.5
So he can rent for 6 hours (the .5 would be charged as a full hour per the problem)
<span>12x+2y=86 -
6x+2y=56
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6x = 30 => x = 30 : 6 = 5
2y = 56 - 30 => 2y = 26 => y = 13</span>

So, in the list of numbers, 8 and 9 are solutions
Answer:
Please see attachment
Step-by-step explanation:
Please see attachment