
The following set of equations is to be solved by using the Cramer’s rule:

Answer to Problem 42E
The solution of the set of eqns.
Explanation of Solution
Given:
Set of equations:
Concept Used:
The Cramer’s rule:
To solve the set of equations which has the same number of equations as variables, a method is used which is known as Cramer’s rule.
Calculations:
A system of two linear equations in two variables is given as:
Write the eqns. in matrix form:
Find the determinant value of matrices first:
Use the Cramer’s rule to find the solution of the equations:
Hence, the solution of the given set of eqns. is
Conclusion:
Hence, the solution of the given set of eqns. is
Chapter 10 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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