SOLUTION: A wealthy man died and left an estate of $975, 240 to be divided among 5 friends, 4 charitable organizations, and his university. His will directed that each friend should receive

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Question 414342: A wealthy man died and left an estate of $975, 240 to be divided among 5 friends, 4 charitable organizations, and his university. His will directed that each friend should receive 3 times as much as all the charities combined, and that each charity should receive twice as much as the the university. How much did they all receive?
Found 2 solutions by stanbon, josmiceli:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A wealthy man died and left an estate of $975, 240 to be divided among 5 friends, 4 charitable organizations, and his university. His will directed that each friend should receive 3 times as much as all the charities combined, and that each charity should receive twice as much as the the university. How much did they all receive?
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Let university share be "x".
Then each charity's share is "2x".
And each friend should receive 3(4*2x)) = 24x
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Solve: 5*24x + 4(2x) + x = 975240
120x+8x+x = 975240
129x = 975240
x = 7560 (university share)
2x = 15120 (each charity's share)
24x = 24*7560 = 181440 (each friend's share)
==============================================
Cheers,
Stan H.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let a = amount received by each friend
Let b = amount received by each charity
Let c = amount received by the University
given:
(1) 5a+%2B+4b+%2B+c+=+975240
(2) a+=+3%2A4%2Ab+
(3) b+=+2c
This is 3 equations and 3 unknowns, so it's solvable
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Substitute (3) into (1)
(3) c+=+%281%2F2%29%2Ab
(1) 5a+%2B+4b+%2B+%281%2F2%29%2Ab+=+975240
Substitute (2) into (1)
(1) 5%2A12%2Ab+%2B+4b+%2B+%281%2F2%29%2Ab+=+975240
60b+%2B+4b+%2B+%281%2F2%29%2Ab+=+975240
128b+%2B+b+=+1950480
b+=+1950480%2F129
b+=+15120
and
(3) c+=+%281%2F2%29%2A15120
c+=+7560
and
(2) a+=+12b+
a+=+12%2A15120
a+=+181440
The 5 friends each got $181,440
The 4 charities each got $15,120
The University got $7,560
check answer:
(1) 5a+%2B+4b+%2B+c+=+975240
(1) 5%2A181440+%2B+4%2A15120+%2B+7560+=+975240
(1) 907200+%2B+60480+%2B+7560+=+975240
(1) 975240+=+975240
OK