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

Question

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

jdoe0001 · Answer

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

anonymous · Answer

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

jdoe0001 · Answer

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

anonymous · Answer

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

jdoe0001 · Answer

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

anonymous · Answer

noo

anonymous · Answer

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

jdoe0001 · Answer

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

anonymous · Answer

yeah i got it thanks

jdoe0001 · Answer

yw