Use Cramer’s rule to solve the linear system.$4x+3y=5\ \ $4x+3y=5 $3x+2y=4$3x+2y=4Solution: (, )
Question
Use Cramer’s rule to solve the linear system.
4x + 3y = 5
3x + 2y = 4
Solution: ( , )
Solution
Cramer's rule is a method used to solve systems of linear equations by expressing the solutions in terms of determinants. Here's how you can use it to solve the given system of equations:
The system of equations is:
4x + 3y = 5 3x + 2y = 4
First, we form the coefficient matrix A and the constant matrix B:
A = | 4 3 | | 3 2 |
B = | 5 | | 4 |
Next, we calculate the determinant of A, denoted as |A|:
|A| = (42) - (33) = 8 - 9 = -1
Now, we form two new matrices by replacing each column of A with B, one at a time, and calculate their determinants:
A1 = | 5 3 | | 4 2 |
|A1| = (52) - (43) = 10 - 12 = -2
A2 = | 4 5 | | 3 4 |
|A2| = (44) - (35) = 16 - 15 = 1
Finally, we find the solutions x and y by dividing the determinants of the new matrices by the determinant of A:
x = |A1| / |A| = -2 / -1 = 2 y = |A2| / |A| = 1 / -1 = -1
So, the solution to the system of equations is (2, -1).
Similar Questions
Use Cramer’s Rule to solve the linear system.$2x+5y=11$2x+5y=11$4x+8y=20$4x+8y=20Solution: (, )
Solve the system of equations minus, 2, x, minus, y, equals, minus, 5−2x−y=−5 and 3, x, minus, 4, y, equals, minus, 423x−4y=−42 by combining the equations.
5𝑥−𝑦=2𝑦+45x−y=2y+4𝑏𝑦=3+5𝑥by=3+5xIn the given system of equations, 𝑏b is a constant. If the system has no solution, what is the value of 𝑏b?
Solve the system by substitution.y, equals, 5, xy=5xy, equals, 9, x, plus, 4y=9x+4
Find the solution of the system of equations.minus, 6, x, plus, 5, y, equals, 34−6x+5y=34minus, 6, x, minus, 10, y, equals, 4−6x−10y=4
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.