00:01
So in this question, we want to find the amount of money invested at 8%, 10 % and 12 % risk.
00:07
So we want to represent them as variables x, y, and z.
00:12
And using the clues from the question, we want to form equations in x, y, and z.
00:17
Specifically, we want to form three equations because there's three unknowns.
00:22
And we want to solve them simultaneously to find the values of x, y, and z.
00:28
The way we form these equations is, for example, for equation 1, we get from the question we know that the total income from the investments is 716.
00:43
And how we get that is, so for example, if you invest x amount of money at 8%, the income is 8 % of x.
00:54
So that's 0 .08.
00:56
And we sum them all up together.
01:00
So the amount invested at 8%, the amount invested at 8%, the amount invested at 8%, the amount invested in 10%, the amount invested in 10%, and the amount invested at 12%...