00:01
So for a question like this, we don't have all the information, but we'll use what we've got.
00:07
So we've got $4 ,000 to invest at, okay, so it's not completed here, but we're going to do a basic one just to explain how it works.
00:20
So one out of 5 % and do the rest at 14%.
00:25
A typical question like this may ask, it may say the interest over the year is $440 total.
00:45
What was the investment? so for something like this, what we're going to do is, so we've got 8%, i'm going to times this by x.
01:05
I'm going to say x is equal to, this is equal to the 8 % investment.
01:17
And so 8 % of x plus 14 % of 4 ,000 minus x, which is the 14 % investment, because it's just the rest of the money.
01:47
14 % investment.
01:49
And now we've got what we can do...