victor has invested $4000 into two accounts, part at 5% simple interest and part at 9% simple interest. Find how much he invested at each rate if the total interest after 1 year is $311.

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- October 23rd 2006, 12:58 PMtrapt2006@sbcglobal.net[SOLVED] simple word problem help
victor has invested $4000 into two accounts, part at 5% simple interest and part at 9% simple interest. Find how much he invested at each rate if the total interest after 1 year is $311.

- October 23rd 2006, 01:07 PMJameson
Simple interest is

So say and . This describes the two investment conditions you listed.

Also we know that and

Can you take it from here? - October 23rd 2006, 01:49 PMSoroban
Hello, trapt2006@sbcglobal.net!

Try some baby-talk . . .

Quote:

Victor has invested $4000 into two accounts, part at 5% and part at 9%.

Find how much he invested at each rate if the total interest after 1 year is $311.

He invested dollars at 5%.

. . This will earn: dollars in interest in one year.

He invested the rest at 9%.

. . This will earn: dollars in interest in one year.

His total interest is $311: .

and*there*is our equation!