SOLUTION: In order to purchase a computer for the Student Activities office, the freshman class decides to raise 1/3 of the money, and the sophomore class decides to raise 1/2 of the money.

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Question 740825: In order to purchase a computer for the Student Activities office, the freshman class decides to raise 1/3 of the money, and the sophomore class decides to raise 1/2 of the money. The Student Government Association agrees to contribute the rest, which amounted to $400. What was the cost of the computer?
I am having trouble with finding formulas. I have read my textbook a thousand times and just do not understand.

Found 2 solutions by solver91311, htmentor:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


I already answered this one.

John

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My calculator said it, I believe it, that settles it
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Answer by htmentor(1343) About Me  (Show Source):
You can put this solution on YOUR website!
Let C = the cost of the computer
The contributions are C/3, C/2 and 400, and these contributions add up to the cost of the computer, C:
C/3 + C/2 + 400 = C
Now you just have to solve for C.