SOLUTION: I cannot remeber how to solve equation with 3 variables. the problems are 6x+3y=12z (2x+y)/4=z. I just had this last semester but didn't keep any of my work. This is for an astron

Algebra ->  Equations -> SOLUTION: I cannot remeber how to solve equation with 3 variables. the problems are 6x+3y=12z (2x+y)/4=z. I just had this last semester but didn't keep any of my work. This is for an astron      Log On


   

Question 178349: I cannot remeber how to solve equation with 3 variables. the problems are 6x+3y=12z
(2x+y)/4=z. I just had this last semester but didn't keep any of my work. This is for an astronomy paper that is due monday. will you help me please?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
in general; to solve for three variables, you need three independent equations

substitution and/or elimination are the most straight forward methods

it can also be done with matrices, using Cramer's Rule


the two equations you have are NOT independent
__ multiplying the 2nd equation by 12 gives the 1st equation