Question

How to solve this?

x − 2y − 3z = 1
2x + y + z = 4
x + 3y − 2z = −3

Answer 1

http://openstudy.com/updates/529d0fb7e4b0b97c585db704

Answer 2

or http://www.youtube.com/watch?v=aPKz7011lAA whichever you'd prefer =)

Answer 3

There are several ways in which to solve this "system of linear equations."
Because all your coefficients are simple (integers), you might want to eliminate one variable at a time using the "addition/subtraction" or "elimination" method. Substitution would work, but would be more involved (complicated). Please choose a method that you're willing to experiment with, and then start solving this system.