How do you solve the system x +4y - 6z = 4, 4x - 3y + 2z = 26, x - 2y +2z = 8?
1 Answer
Please see the explanation for step leading to the solution:
Explanation:
Write the 3 equations as an augmented matrix:
Multiply row 1 by -4 and add to row 2:
Multiply row 1 by -1 and add to row 3:
Multiply row 3 by -3 and add to row 2:
Multiply row 2 by -1:
Multiply row 2 by 6 and add to row 3:
Divide row 3 by -4:
Multiply row 3 by 2 and add to row 2:
Multiply row 3 by 6 and add to row 1:
Multiply row 2 by -4 and add to row 1:
This means that
You should check my answer by substution into the orignal equations.