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OpenStudy (anonymous):
Roberto invested some money at 6%, and then invested $2,000 more than twice this amount at 10%. His total annual income from the two investments was $3840. How much was invested at 10%
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OpenStudy (anonymous):
16000
OpenStudy (anonymous):
=$30,000
OpenStudy (anonymous):
yeah got it! first amount is 14000 second amount is 30000
OpenStudy (anonymous):
x*0.06 + (2x+2000)*0.1 = 3840
OpenStudy (anonymous):
yes thank you
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