00:01
So what i'm going to do is call the x my bond and the y the cd.
00:09
And so what we know is the amount of money that is put into each has to add up to be 80 ,000.
00:17
But then we have a second equation that you're getting 15 % return on the x.
00:22
And, uh, what do we got? 7 % return on the y.
00:26
And what we need to add up to is $6 ,000 in return total.
00:31
So what we can do is multiply the top and bottom.
00:35
I like to do a negative number.
00:37
I'm going to do an 8 .07.
00:39
And the thought process is that these y's will cancel and 80 ,000 times negative 0 .07 is negative 5 ,600.
00:53
So now what i can do is just add these two equations down.
00:56
And the thought process is adding equal things to equal things...