Solve each system.
x + y + z = 4
x - y + z = 2
x - y - z = 0
Which one should I use to take out?
it doesnt matter. you get to choose. but maybe start w/ subtracting the 1st 2 to get the soln for y. & you can add the last 2 to get 2x-2y=2 so x-y=1. then back-solve to get x. then get z w/ any of the eqns.Solve each system.
x + y + z = 4
x - y + z = 2
x - y - z = 0
Which one should I use to take out?