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problem solvng

by sumasajja » Sun Jul 24, 2011 8:19 am
the daily rate for a hotel room that sleeps 4 people is $39 for one person and x dollars for each additional person.if 3 persons take the room for one day and each pays $21 for the room, what is the value of x?
a]6
b]8
c]12
d]13
e]24
the answer is [spoiler]c
[/spoiler]
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by winniethepooh » Sun Jul 24, 2011 8:28 am
The hotel room costs $39 for each day, and x for each additional person.

If three people rent the room for one day and pay $21 each then all collectively pay $63.

63 - 39 = 24 is the additional rent for 2 people.
Therefore, value of x is 24/2 = 12.

Hence, C.
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by knight247 » Sun Jul 24, 2011 8:31 am
3 ppl spending a night in the room would have to pay 39+x+x for the night

Given that the 3 ppl end up paying $21 each so the total they pay is 21*3=63

From statement 1 and 2

39+x+x=63
39+2x=63
2x=24
x=12 hence C
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