answer to 18x+4y=-4 and -9x+8y=-8

use elimination
in Algebra 1 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

Halve the first equation: 9x+2y=-2 and add to the second equation -9x+8y=-8:

10y=-10, y=-1.

Substitute for y in either equation: -9x+8y=-9x-8=-8, -9x=0, x=0.

Solution: x=0, y=-1.
by Top Rated User (1.1m points)

Related questions

1 answer
-9x+8y=29 - -18x+4y=-19
asked Nov 28, 2012 in Algebra 2 Answers by anonymous | 792 views
1 answer
answer to -8y-9x-(-4y+5x)
asked Sep 24, 2012 in Algebra 1 Answers by anonymous | 924 views
1 answer
what is the perimeter of this triangle 9x - 8w = 2x + 8y = 4y + 4w
asked Sep 28, 2014 in order of operations by tricia2807 Level 1 User (120 points) | 936 views
1 answer
how do i factor 9x^3+18x^2-4x-8
asked Nov 1, 2012 in Algebra 2 Answers by anonymous | 780 views
1 answer
Answer to the question 5x-4y=8y
asked Jan 15, 2013 in Algebra 1 Answers by anonymous | 593 views
2 answers
Answer to the question 5x-4y=8y
asked Jan 15, 2013 in Algebra 1 Answers by anonymous | 1.1k views
1 answer
How do you solve 18x + 9 = 9x + 42?
asked Nov 8, 2017 in Pre-Algebra Answers by Mathical Level 10 User (57.4k points) | 668 views
2 answers
(9x^3-18x^2-x+2) / (3x+1)?
asked Sep 11, 2014 in Algebra 2 Answers by Destiny | 1.5k views
1 answer
How to complete the square of 9x^2-18x+3
asked Nov 6, 2013 in Trigonometry Answers by anonymous | 718 views
1 answer
Factor 9x^3 + 18x^2 – x – 2
asked Oct 12, 2013 in Algebra 1 Answers by anonymous | 774 views
1 answer
factor 9x^3+18x^2-x-2
asked Apr 17, 2013 in Algebra 2 Answers by anonymous | 591 views
1 answer
y=9x+3+y=18x
asked Mar 12, 2013 in Algebra 1 Answers by anonymous | 623 views
1 answer
18x*2+9x-14=0
asked Mar 7, 2013 in Algebra 2 Answers by anonymous | 958 views
1 answer
solve for x: 48x^3-9x=18x
asked Feb 5, 2013 in Algebra 1 Answers by anonymous | 572 views
1 answer
(27x^5 + 9x^4 - 18x^3) / 9x^ 2
asked Jun 19, 2012 in Algebra 2 Answers by anonymous | 1.8k views
4 answers
(9x^3+18x^2-x+2)/(3x+1) in long division
asked Feb 4, 2012 in Algebra 2 Answers by anonymous | 7.2k 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. complete the following. 825 use each digit once .make the two smallest 3 digit numbers and two largest 3-digit number (2)
  4. Solve 15 -1(12÷4+1)? (4)
  5. 8:4(5+2) (3)

Most popular tags

87,544 questions
99,732 answers
2,417 comments
483,051 users