8m+4a=168 and 4m-6a=132 by substitution and elimination

How do you solve 8m+4a=168 , 4m-6a=132 by substitution and 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

Divide the first equation by 2:

4m+2a=84 so 4m=84-2a;

4m=132+6a from the second equation, so 84-2a=132+6a.

Solving this for a: 8a=-48, a=-6.

4m=84-2a, so 2m=42-a=42+6=48, m=24.
by Top Rated User (1.2m points)

Related questions

1 answer
is 4m in width and 8m in lenght is equal to 33sqm?
asked Feb 18, 2013 in Word Problem Answers by allanainza Level 1 User (120 points) | 554 views
1 answer
3N + 4M = 230; 5N = 8M = 390
asked Nov 8, 2011 in Algebra 1 Answers by anonymous | 835 views
1 answer
how do you solve this problem 8m - 7 < 4m + 5
asked Oct 6, 2011 in Algebra 1 Answers by anonymous | 818 views
1 answer
solve 6a+6b-c=-2, 8a+4b+c=-7, 2a-6b-7c=10 by elimination
asked Oct 6, 2013 in Algebra 2 Answers by anonymous | 1.8k views
1 answer
(4a^3-4a^2)+(6a^3+5a^2)
asked Apr 30, 2018 in Algebra 1 Answers by anonymous | 451 views
1 answer
-7b+4a-6a-9b how to solve
asked Feb 1, 2014 in Pre-Algebra Answers by anonymous | 1.0k views
1 answer
6a+4b+8+3b-4a+9
asked Aug 22, 2013 in Algebra 1 Answers by anonymous | 803 views
1 answer
(-a^2+5a-8)-(-4a^2+6a-5)
asked Jul 5, 2013 in Algebra 1 Answers by brad | 697 views
1 answer
find the product [6a+5] [4a-1]
asked Jun 5, 2013 in Algebra 2 Answers by anonymous | 519 views
1 answer
4a+3b=12 , 6a-5b=2 gauss method
asked Apr 5, 2013 in Calculus Answers by anonymous | 729 views
1 answer
find the perimeter of 4a + 8 + 6a + 5
asked Apr 3, 2013 in Algebra 2 Answers by anonymous | 639 views
1 answer
2a(5a-2) + 3a(2a+6) + 8 =a(4a+1) + 2a(6a-4) + 50
asked Jan 31, 2013 in Algebra 1 Answers by anonymous | 1.6k 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(12รท4+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
732,406 users