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September 18, 2014

September 18, 2014

Posted by **anonymous** on Saturday, October 11, 2008 at 2:38pm.

6x-6y-4z=-10

-5z+4y-z=-12

2x+3y-2z=9

- math -
**drwls**, Saturday, October 11, 2008 at 6:00pmMultiply the last equation (both sides) by 2. That gives you

4x + 6y - 4z = 18

Add that to

6x - 6y - 4z = -10

That gives you

10x -8z = 8

So far, we have eliminated the variable y.

Use similar tricks to get rid of x or z.

I believe your second equation is typed incorrectly. Did you mean

-5x +4y -z = -12?

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