SOLUTION: x-y+5z=19 3x+z=4 x+2y+z=6

Algebra.Com
Question 1131323: x-y+5z=19
3x+z=4
x+2y+z=6

Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
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x-y+5z=19
3x+z=4
x+2y+z=6
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E2 gives .

2*E1+E3 gives

Substitute for z in that result:

-



This is one of the variables solved.

Returning to E2,




Another variable now solved.

Use both of these values to find the last or y variable.

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