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OpenStudy (anonymous):
Find if no solution, only one solution and if so, find the variables, or infinitely many solutions x-2y+2z=-7 6x-4y-z=-2 7x-6y+z=6
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OpenStudy (btaylor):
If you know how to work matrices, create a 3 x 4 matrix. It should look like this: |dw:1339368910888:dw| Put it in reduced row echelon form (or use a calculator to do it). It doesn't work out like it should, so there is no solution.
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