Question

Need help solving Three-Variable Systems by substitution ALGEBRA 2 Problem x-4y+z=6 2x+5y-z=7 2x-y-z=1

Answer 1

do you know how to solve a 2 variable system of equations by substitution?

Answer 2

yeah I already combined e1 and 2 and e2 and 3 I just don't know what to do after that

Answer 3

after that you'd have a system of equations of 2 variables, and do the same, substitute

Answer 4

i did that and what do i do with the equation i have now.

Answer 5

did you end up with 2 equations of 2 variables only?

Answer 6

noo

Answer 7

ohh ohh nevermind i got it! haha thank you!!!

Answer 8

well. the idea behind solving a 3 variables set, is to eliminate one of the variables, thus leaving you with 2 only

Answer 9

yeah i got it thanks

Answer 10

yw