math
posted by anonymous .
solve the system by elimination.
6x6y4z=10
5z+4yz=12
2x+3y2z=9

Multiply 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?