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OpenStudy (anonymous):
I need help on doing these problems, I also need to know the steps of doing it. Solve system by three variables using Elimination -3x+3y+4z=0 -3x-y+z=-3 3x+4y+4z=5
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OpenStudy (anonymous):
The first thing that you do is add the #'s that have a letter to them and when you have a letter alone it reperesents 1 so it would be -3x-1+1
OpenStudy (anonymous):
Don't understand. Because as i know, you start with two equations.
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