5s+3t+6=0 3s+5t+18=0

Please help         .
in Pre-Algebra Answers by Level 1 User (220 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

line 1: 5s+3t=-6

line 2: 3s +5t=-18

from line 1:t=(-6-5s)/3=-2 -(5/3)s

plug this in line 2:

3s+5*[-2 -(5/3)s]=-18

3s -(25/3)s -10=-18

(-16/3)s=-8

s=+8*3/16=24/16=3/2

plug intu line 1...5*(3/2)+3t=-6

3t=-6-15/2=-27/2

t=-27/6
by

Related questions

1 answer
3s+5t=13 and 5s-15t=17
asked Oct 11, 2012 in Algebra 2 Answers by anonymous | 761 views
1 answer
How do you solve r^5s(5r^4s^2+r^3s^5?
asked Mar 12, 2013 in Algebra 1 Answers by anonymous | 691 views
1 answer
(3s^3+3s^2)+(-2s^3-5s^2+1)
asked Feb 13, 2013 in Algebra 1 Answers by anonymous | 685 views
2 answers
inverse laplace transform (3s-10)/(s^2+5s)
asked Nov 17, 2011 in Calculus Answers by anonymous | 2.4k views
1 answer
substitutuion method for 5s-2t=16 and s+3t=10
asked Nov 18, 2011 in Pre-Algebra Answers by anonymous | 755 views
1 answer
2.4x10^-5T^2+4.1x10^-3T-4.3x10^-1=0
asked May 1, 2013 in Algebra 2 Answers by anonymous | 588 views
1 answer
solve the inequality: 5t + 3 < 3t + 9t < 6
asked Aug 24, 2013 in Algebra 1 Answers by anonymous | 672 views
1 answer
can you work this problem 5t-t-5=3t-8
asked Jun 13, 2012 in Algebra 1 Answers by anonymous | 825 views
1 answer
s=5 for 18=3s-3
asked Sep 28, 2011 in Algebra 1 Answers by anonymous | 916 views
1 answer
solve the system of equation 3r-4s=0 and 2r+5s=23
asked Mar 25, 2013 in Algebra 1 Answers by anonymous | 824 views
1 answer
help me solve 4r+7s-3(5r-5s)
asked Dec 14, 2013 in Algebra 1 Answers by anonymous | 666 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
732,797 users