SOLUTION: Distribute $6,750 among Fred, Grace, and Aaron. Grace should receive twice as much as Fred and Aaron three times as much as Grace.

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Question 168617: Distribute $6,750 among Fred, Grace, and Aaron. Grace should receive twice as much as Fred and Aaron three times as much as Grace.
Found 2 solutions by midwood_trail, josmiceli:
Answer by midwood_trail(310) About Me  (Show Source):
You can put this solution on YOUR website!
Distribute $6,750 among Fred, Grace, and Aaron. Grace should receive twice as much as Fred and Aaron three times as much as Grace.
Fred = x
Grace = 2x
Aaron = 3(2x)
Then:
x + 2x + 3(2x) = 6750
x + 2x + 6x = 6750
9x = 6750
x = 6750/9
x = 750
Fred gets x or $750.
Grace gets 2x or 2(750) = $1,500
Aaron gets 3(2x) or 3(1500) = $4,500
I hope that helps.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
f= amount Fred gets
g= amount Grace gets
a= amount Aaron gets
Given:
(1) g+=+2f
(2) a+=+3g
(3) a+%2B+f+%2B+g+=+6750
-------------
From (1)
(4)f+=+g%2F2
Now substitute (2) and (4) into (3)
(3) a+%2B+f+%2B+g+=+6750
(4) 3g+%2B+g%2F2+%2B+g+=+6750
Multiply both sides by 2
(5) 6g+%2B+g+%2B+2g+=+13500
(6) 9g+=+13500
(7) g+=+1500
Substitute this back in (2)
(2) a+=+3g
(8) a+=+3%2A1500
(9) a+=+4500
Substitute (7) into (4)
(4) f+=+g%2F2
{10) f+=+1500%2F2
(11) f+=+750
Fred gets $750, Grace gets $1500, Aaron gets $4500
check:
(1) g+=+2f
(2) a+=+3g
(3) a+%2B+f+%2B+g+=+6750
--------------
(1) g+=+2f
(12) 1500+=+2%2A750
(13) 1500+=+1500
--------------
(2) a+=+3g
(14) 4500+=+3%2A1500
(15) 4500+=+4500
--------------
(3) a+%2B+f+%2B+g+=+6750
(16) 4500+%2B+750+%2B+1500+=+6750
(17) 6750+=+6750
OK