SOLUTION: the average of three number is 39.if the first number is twice the second and the second is four times the third,find the numbers

Question 697884: the average of three number is 39.if the first number is twice the second and the second is four times the third,find the numbers
Answer by Stitch(470) (Show Source): You can put this solution on YOUR website!
Equation 1:
Equation 2:
Equation 3:
Since B = 4C and A = 2B; A = 4C*2
So A = 8C
Rewrite equation 3 in terms of C
Equation 3:

Multiply both sides by 3

Simplify

Divide both sides by 13

Now plug 9 into equation 2 for C
Equation 2:

Now plug 36 into equation 1 for B
Equation 1:

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