Y=-3x+6 x+y=8

I need help solving this problem with elimination..
in Pre-Algebra Answers by

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

Problem: Y=-3x+6 x+y=8
I need help solving this problem with elimination..

y = -3x + 6
3x + y = 6

x + y = 8

Eliminate y by subtracting the second equation
from the first (re-written) equation...

 3x + y = 6
-(x + y = 8)
--------------
 2x      = -2
2x = -2
x = -1

Now, solve for y.

y = -3x + 6
y = -3(-1) + 6
y = 3 + 6
y = 9

Check by using the second equation.

x + y = 8
-1 + 9 = 8
8 = 8

Answer: x = -1, y = 9

 

by Level 11 User (78.4k points)

No related questions found

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
100,324 answers
2,420 comments
753,771 users