How we worked it out
Updated as you change the numbers.
- Gauss–Jordan elimination with partial pivoting: clear each column above and below its pivot, then divide.
Method and assumptions
A system has a unique solution when its coefficient matrix has a nonzero determinant. Otherwise there are no solutions or infinitely many.
Questions
Solve 2x + y − z = 8, −3x − y + 2z = −11, −2x + y + 2z = −3.
x = 2, y = 3, z = −1.
Sources
Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.