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OpenStudy (anonymous):
3x+2y-4z=-7 x-4y+5z=9 2x+2y-5z=-12 could someone show me how to solve this system of equations? thanks!
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OpenStudy (mertsj):
Subtract the bottom equation from the first equation. That will eliminate the y term
OpenStudy (mertsj):
Then multiply the top equation by 2 and add the result to the middle equation. That will eliminate the y term again.
OpenStudy (mertsj):
Now you have two equations with the variables x and z. Solve that system.
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