x + 2y = 7 3x + 5y = 17

solve system using any algebraic method
in Algebra 2 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

1) x + 2y = 7  or x = 7 - 2y

2) 3x + 5y = 17

substitute eq(1) into eq(2):

3(7 - 2y) + 5y = 17

21 - 6y + 5y = 17

-y = -4

y = 4

using eq(1):

x = 7 - 2(4) = -1

check using eq(2):

3(-1) + 5(4) = 17

-3 + 20 = 17

x = -1, y = 4
by Level 6 User (23.1k points)

Related questions

1 answer
Solve 2(3x-5y)-14+17(x+2y)+9
asked Feb 13, 2013 in Algebra 1 Answers by anonymous | 1.2k views
1 answer
3x+2y=17 2x+5y=26
asked Nov 22, 2011 in Algebra 1 Answers by anonymous | 11.9k views
1 answer
2x + 5y = 17 -2x − 2y = 4
asked Dec 14, 2017 in Algebra 1 Answers by anonymous | 1.8k views
1 answer
SOLVE USING ELIMINATION METHOD 7X+5Y=-17,3X-5Y=-43
asked Jul 17, 2014 in Algebra 1 Answers by anonymous | 1.1k views
1 answer
x+2y=7 3x+5y=24
asked Jan 14, 2013 in Algebra 1 Answers by anonymous | 1.3k views
1 answer
-5y-7=7y+17
asked Oct 2, 2012 in Algebra 1 Answers by anonymous | 733 views
1 answer
how do you solve (3x+2y=17 -2x+4y=7) in matrix form?
asked Oct 18, 2011 in Calculus Answers by eng. alex Level 1 User (120 points) | 706 views
1 answer
solve equation 6x+5y=0, 3x-2y = 19
asked Mar 18, 2016 in Other Math Topics by tolu | 1.2k views
1 answer
(15x^3+19x^2y-7xy^2+5y^3)÷(3x+5y)
asked Nov 8, 2015 in Algebra 2 Answers by anonymous | 631 views
1 answer
solve the simultaneous equation 2x+5y=1,3x-2y=30
asked Apr 24, 2014 in Other Math Topics by anonymous | 2.0k views
1 answer
[x-2y][3x=5y]
asked Feb 8, 2014 in Geometry Answers by ghfyi | 486 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
100,328 answers
2,420 comments
756,778 users