
Concept explainers
To calculate: The amount of money invested in each account.

Answer to Problem 23PPS
The amount of money invested in account A is
Explanation of Solution
Given information:
The amount money invested in 3 accounts is
Calculation:
It is provided that the amount money invested in 3 accounts is
Let amount of money invested in account A isx , amount of money invested in account Bbe y and amount of money invested in account Cbe z .
It is provided that the amount money invested in 3 accounts is
The amount of money invested in account A is
The expected rate of interest to be earned is
So,
The system of equations obtained is,
Since,
So,
And,
Therefore, equations are
Use the method of substitution to solve the new first equation and third equation of system above.
Now substitute
Now substitute
Therefore, solution is the coordinate pair,
Thus, the amount of money invested in account A is
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