00:01
That we want to invest in.
00:01
Triple a has 5 % earns 5%, a earns 6%, and then b earns 9%.
00:12
The client wants to invest twice as much in a as in b.
00:16
So i'm going to let x equal to what we're going to invest in a, and no, it wants to do it in triple a.
00:25
So we're going to have 2x here.
00:27
So now how much should be invested at each type, the total investment is 23 ,000.
00:36
That tells us how much is in a, 23 ,000 minus what's in aa, triple a, and minus what's in b.
00:44
And he wants to earn a total of $1 ,430 in interest.
00:54
So that's going to be our interest.
00:55
So now we need to work on what our interest is.
00:58
That's going to end up being our interest here.
01:01
It's going to be 5 % of the principal.
01:04
Here we're going to have 6 % of the principle, and i'm going to go ahead and combine those to get negative 3x, and here we're going to have 9 % of the principle, and that's going to give us our interest...