Answer:
x dollars invested at 13% means
{( 13 /100 )*x} = 0.13x , is being invested.
and 15000-x dollar is being invested at 9% means
{( 9/100) * (15000-x)} = 0.09(15000-x) , is being invested.
so from here we can get that total amount that is being invested is {0.13x + .09(15,000 - x)}.
so,
0.13x + 1350 - 0.09x
0.04x + 1350 dollars
so total amount has being invested is 0.04x + 1350 dollars.
if here x dollar value is given then we can get the total numerical value of invested dollar money.
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Question: The combined yearly interest of x dollars invested at 13% and 15000 - x dollars invested at 9% is?
