SOLUTION: I have tried and tried to solve this! Can you help me?! Mr. Graham invested some of his $18,000 in bonds that made a 5% profit and the rest in bonds that made a 12% profit. If

Question 273158: I have tried and tried to solve this! Can you help me?!
Mr. Graham invested some of his $18,000 in bonds that made a 5% profit and the rest in bonds that made a 12% profit. If the profit on the 12% bonds was $885 more than the profit on the 5% bonds, ow much did Mr. Graham invest in the 5% bonds?
I would really like to understand this!!
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Mr. Graham invested some of his $18,000 in bonds that made a 5% profit and the rest in bonds that made a 12% profit. If the profit on the 12% bonds was $885 more than the profit on the 5% bonds, ow much did Mr. Graham invest in the 5% bonds?

Let him invest x in 5% bonds
5%bonds-----------------12%bonds-------------- Total
x------------------------18000-x---------------18000 ( Investment)

0.05x--------------------0.12(18000-x) ( interest)

The difference betwen 12% bond interest and 5% bond interest is $885
0.12(18000-x) -0.05x=885
2160 - 0.12x -0.05x = 885

-0.17x =-2160+885
-0.17x = -1275
x= -1275/0.17
=7500
He invested $ 7500 in 5% bonds

RELATED QUESTIONS
Mr. Graham invested some of his $18,000 in bonds and made a 5% profit and the rest in... (answered by ankor@dixie-net.com)

Hello! I'm insanly confused by a word problem. It is: "Mr. Graham invested some of his (answered by richwmiller,Edwin McCravy)

Hello! I've tried this problem a few ways, and cannot seem to arrive at the answer (the... (answered by ankor@dixie-net.com,MathTherapy)

A total of $20,000 is to be invested. Some in bonds and some in CD's. The amount in... (answered by lucky83,DWL)

This problem is for a project we were given: Jeremy inherits $200,000 and invests... (answered by rajagopalan,checkley77,Earlsdon)

Mr. Ferrier invested $26,000. Some was invested in bonds that made a 5% profit, and the... (answered by ikleyn)

I've been working on profit equations and am starting to understand, but this one added... (answered by Mathtut)

ok i have a problem I have tried many things I cannot figure out the equation can you... (answered by nerdybill)

You have invested some money and made a profit of $55. Your profit was 11% of you... (answered by solver91311)