SOLUTION: Mardi recieved an inheritance of $50,000, She invested part at 10% and deposited the remainder in tax-free bonds at 11%. Her total annual income from the investments was $5200. Fin

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Question 127450: Mardi recieved an inheritance of $50,000, She invested part at 10% and deposited the remainder in tax-free bonds at 11%. Her total annual income from the investments was $5200. Find the amount invested at 10%.
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
.1x+.11(50,000-x)=5,200
.1x+5,500-.11x=5,200
.01x=5,200-5,500
-.01x=-300
x=-300/-.01
x=$30,000 invested @ 10%.
PROOF:
.1*30,000+.11(50,000-30,000)=5,200
3000+.11*20,000)=5,200
3000+2,200=5,200
5,200=5,200