Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
PLEASE HELPP (:
If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the first equation. x6y+3z=0 2x5y+8z=7 x+7y4z=13
 2 years ago
 2 years ago
PLEASE HELPP (: If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the first equation. x6y+3z=0 2x5y+8z=7 x+7y4z=13
 2 years ago
 2 years ago

This Question is Closed

phantomBest ResponseYou've already chosen the best response.0
plug in x= 6y3z in eqns 2 and 3 in place of x to get 2 eqns in y and z only
 2 years ago

waleed_khaBest ResponseYou've already chosen the best response.0
x6y+3z=0..........................1 2x5y+8z=7........................2 x+7y4z=13.........................3 Take eq 1 x= 6y3z sub this in equation 2 and 3 2( 6y3z)5y+8z=7..................2 6y3z +7y4z=13.....................3 simplify 12y6z5y+8z=7 then it be 7y+2z=7................2 multiplying by 7 13y7z=13..............3 multiplying by 2 49y+14z=49 .............2 26y14z=26...............3 adding both equations to each other to get 75 y = 75 then y=1 sub value of y in 2 or 3 to get 7+2z=7 2z=0 z= zero sub z= zero , y =1 , in eq 1 x= 6y3z x=6 Hope I'm right . and You are welcome .. regards
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.