Thread: Solving the system of equations

Ok this is the system:

x1 + x2 + 2x3 - x4 = 4
x1 + 3x2 - 3x3 - x4 = 1
2x1 + 3x2 + 3x3 + x4 = 8
3x3 - 7x3 + x4 = -4

I need to solve it, and I am guessing its done by row operations, but I cant realy understand how its done.

Originally Posted by LooNiE

Ok this is the system:

x1 + x2 + 2x3 - x4 = 4
x1 + 3x2 - 3x3 - x4 = 1
2x1 + 3x2 + 3x3 + x4 = 8
3x3 - 7x3 + x4 = -4

I need to solve it, and I am guessing its done by row operations, but I cant realy understand how its done.

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