Sarah P.

asked • 12/11/14

Me and my mummy have spent about an hour and a half on this one question. Please help us!! It is about elimination using multiplication

Gunther invested $10000 into two mutual funds. One of the funds rose 6% in one year and the other rose 9% in one year. If Gunthers investment rose a total of $684 in one year how much did he invest in each mutual fund?

1 Expert Answer

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Mark M. answered • 12/11/14

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x + y = 10000
0.06x + 0.09y = 684
 
x + y = 10000
6x + 9y = 68400
 
6x + 6y = 60000
6x + 9y = 68400
 
3y = 8400
y = 2800
 
x = 7200
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Da B.

where did you get the 3y from?
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12/02/21

Sourav C.

tutor
On step 3, Mark multiplied 6x + 6y with -1 so that he could cancel out the variable x. Thus, 9y-6y = 3y. I hope this helps!
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01/05/23

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