SOLUTION: melissa invested a sum of money at 4% annual interest. she invested three times that sum at 5% annual interest. if her total yearly interest from both investments was 5600, how muc

Question 374859: melissa invested a sum of money at 4% annual interest. she invested three times that sum at 5% annual interest. if her total yearly interest from both investments was 5600, how much was invsted at 4%?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!



Hi,

Let x represent amount invested at 4%.  thne 3x would be the amount at 5%

Question states

.04x + .05*3x = $5600

.19x = 5600

x = $29,473.68, amount invested at 4%

CHECKING our Answer

.04*$29,473.68 + .05*8821.05  = $1178.95 + $4422.05 = $5600 

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