Solve -3x-4z = -18
7y + z = 10 for x,y,z
5x - y + 6z = 27

Question

Solve -3x-4z = -18
          7y + z = 10              for x,y,z
          5x - y + 6z = 27

nowhereman · Answer

You should use Gauß's elimination algorithm.

anonymous · Answer

i did the problem already but i got the answers all wrong
so now im not sure what the answers are... at all

nowhereman · Answer

Ok, I'll show you how to start:
eliminate x from the third equation by use of the first. Multiply the first by five and the third by three and add them together. Then continue with this new equation replacing the initial third. Next eliminate y from the third by use of the second equation. This will yield z.