When using this method to solve a system of three equations in the variables x, y, and z, you start by eliminating x from the second and third equations. Then
eliminate y from the third equation. The third equation now has a single variable,
z; solve the third equation for z. Then use the value of z to solve the second
equation for y. Finally, use the values of y and z to solve the first equation for X
Elimination method
O Dimensions of Matrix method
ОО
Gaussian elimination method
Substitution method