SOLUTION: The sum of three numbers is 63. The first number is half of the second, and the third number is three times the second number. What is the value of the first number.

Question 168498: The sum of three numbers is 63. The first number is half of the second, and the third number is three times the second number. What is the value of the first number.
Answer by aaadam606(1) (Show Source): You can put this solution on YOUR website!
A=1st number
B=2nd number
C=3rd number
A=The first number is half of the second=
A=.5B
B= B
C=the third number is three times the second number.
A=3B
.5B+B+3B=63
Add them all together:
4.5B=63
Divide both sides by 4.5 to get B alone.
B=14
Plug that into your equation of .5B+B+3B=63
It comes out to 63 so your first number is half of B which is 7.
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