x+y-2z=5;x+z=4;y-z=6

Solve for x,y and z
in Algebra 1 Answers by Level 1 User (180 points)

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

Call the equations A, B and C.

B+C: D: x+y=10

Substitute D in A: 10-2z=5, 2z=5, z=2.5.

Substitute for z in B: x=1.5.

Substitute for z in C: y=8.5.

Substitute for x, y and z in A as a check: 1.5+8.5-5=5, so values check out OK.
by Top Rated User (1.2m points)

Related questions

1 answer
x + y + z = 1 (Eq1) x + y − 2z = -2 (Eq2) 3x − 2y + z = 6 (Eq3)
asked Apr 29, 2019 in Algebra 1 Answers by anonymous | 594 views
1 answer
x+y+z=6 and 3x-y+2z=7 and 3y-4z=-6
asked Nov 11, 2015 in Trigonometry Answers by nicks | 653 views
1 answer
x+y+z=6 and 3x-y+2z=7 and 3y-4z=-6
asked Nov 11, 2015 in Trigonometry Answers by anonymous | 1.1k views
1 answer
x+y+z=6 and 3x-y+2z=7 and 3y-4z=-6
asked Nov 9, 2015 in Other Math Topics by nikki | 821 views
1 answer
2z-3xy (z=23, x=1.5, y=6)
asked Aug 19, 2014 in Pre-Algebra Answers by Trisha | 807 views
1 answer
2w+3x+y-z=9, -w+x+y+2z=10, 3w+x-y-z=-2, w-x+y-z+-6
asked Mar 28, 2013 in Algebra 2 Answers by anonymous | 750 views
1 answer
solve for x+y=z=5 2x+4y+2z=6 -x+6y-3z=21
asked Nov 2, 2011 in Pre-Algebra Answers by anonymous | 1.8k views
1 answer
Solve the system: 2x+y-2z=-1; 3x-3y-z=5; x-2y+3z=6
asked Oct 10, 2011 in Algebra 2 Answers by anonymous | 4.5k views
1 answer
5x+6y+7z=178, 6x+4y+2z=124, then 3(x+y+z)=?ll
asked Jul 6, 2019 in Algebra 1 Answers by Sitaram Shendarkar | 912 views
1 answer
solve for x,y,z. 3x-4y+2z -5x+3y+6z -6x+2y-8z
asked Dec 1, 2018 in Algebra 2 Answers by Kevin | 796 views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!

Most popular questions within the last 3000 days

  1. 50+50-25X0+2+2= (19)
  2. it takes 10 road workers 5 days to complete a road repair when working 2 hours a day.Working at the same pace,how many days will it take 2 people working 5 hours a day to finish it? (3)
  3. Solve 15 -1(12÷4+1)? (4)
  4. 8:4(5+2) (3)
  5. How can i represent 1/3; 3/3; 7/3; 10/3 and 15/3 on a number line? (1)

Most popular tags

87,516 questions
100,279 answers
2,420 comments
733,293 users