Ask
your own question, for FREE!
Mathematics
104 Online
OpenStudy (anonymous):
I am really confused! Solve the system by substitution. -x - y - z = -8 -4x + 4y +5z = 7 2x + 2z = 4
Still Need Help?
Join the QuestionCove community and study together with friends!
OpenStudy (anonymous):
Step 1: Take the first equation and solve for a variable. x= -y-z+8 Step 2: Plug the new equation into a different equation and simplify. [[I will plug it into the 3rd equation]] 2(-y-z+8)+2z=4 -2y-2z+16+2z=4 -2y+16=4 -2y=-12 y=6
OpenStudy (anonymous):
Step 3: Plug in x and y into the last equation. -4((-6)-z+8)+4(6)+5z=7 24+4z-32+24+5z=7 16+9z=7 9z=-9 z=-1
OpenStudy (anonymous):
Step 4: Plug in y and z into the original equation -x-(6)-(-1)=-8 -x-6+1=-8 -x-5=-8 -x=-3 x=3
OpenStudy (anonymous):
SO x=3, y=6, and z=-1
OpenStudy (anonymous):
Thank you so much for breaking it down for me. That makes a lot of sense!
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
Kamiehameha69:
Would you rather your shirt constantly be wrinkled no matter what fabric it is, o
3 minutes ago
0 Replies
0 Medals
Amnesia:
Pain started when we wasnu2019t together Pain ends when we are together
14 minutes ago
5 Replies
0 Medals
Thayes:
Somebody please tell me what this says u81eau5206u3092u96a0u3059u3053u3068u304cu3
48 minutes ago
14 Replies
1 Medal
Subshilava:
The formation of the state of Israel in 1948 significantly altered the dynamics of the Middle East.
1 hour ago
2 Replies
0 Medals
toga:
Congratulations to my mom, @oliver69, for reaching the green.
31 minutes ago
8 Replies
1 Medal