SOLUTION: walt made an extra $8000 last year from a part time job. He invested part of his money at 6% and the rest at 9%. He maid a total of $570 how much was invested at 9%.

SOLUTION: walt made an extra $8000 last year from a part time job. He invested part of his money at 6% and the rest at 9%. He maid a total of $570 how much was invested at 9%.

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Question 222220: walt made an extra $8000 last year from a part time job. He invested part of his money at 6% and the rest at 9%. He maid a total of $570 how much was invested at 9%.
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
.06x+.09(8000-x)=570
.06x+720-.09x=570
-.03x=-150
x=$5000 at 6%
8000-x=$3000 at 9%
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