# SOLUTION: An investment of 5600 is made at an annual simple interest rate of 6.5%. How much additional money must be invested at an annual simple interest rate of 9% so that the toatl inter

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 Question 146602: An investment of 5600 is made at an annual simple interest rate of 6.5%. How much additional money must be invested at an annual simple interest rate of 9% so that the toatl interest earned is 8% of the total investementAnswer by checkley77(12569)   (Show Source): You can put this solution on YOUR website!5600*.065+.09x=.08(5600+x) 364+.09x=448+.08x .09x-.08x=448-364 .01x=84 x=84/.01 x=8,400 invested @ 9% will stiafy the need. proof: 5600*.065+.09*8,400=.08(5600+8,400) 364+756=.08*14,000 1,120=1,120