SOLUTION: 2x - y + 13 2x + 3y = -7

Algebra ->  Graphs -> SOLUTION: 2x - y + 13 2x + 3y = -7       Log On


   

Question 224233: 2x - y + 13

2x + 3y = -7


Answer by drj(1380) About Me  (Show Source):
You can put this solution on YOUR website!
2x - y + 13 I assume you meant 2x-y=13
2x + 3y = -7

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++2%5Cx+%2B+-1%5Cy+=+13%2C%0D%0A++++2%5Cx+%2B+3%5Cy+=+-7+%29%0D%0A++We'll use substitution. After moving -1*y to the right, we get:
2%2Ax+=+13+-+-1%2Ay, or x+=+13%2F2+-+-1%2Ay%2F2. Substitute that
into another equation:
2%2A%2813%2F2+-+-1%2Ay%2F2%29+%2B+3%5Cy+=+-7 and simplify: So, we know that y=-5. Since x+=+13%2F2+-+-1%2Ay%2F2, x=4.

Answer: system%28+x=4%2C+y=-5+%29.



I hope the above steps were helpful.

For free Step-By-Step Videos on Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra or for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.

And good luck in your studies!

Respectfully,
Dr J

drjctu@gmail.com

http://www.FreedomUniversity.TV
http://www.Facebook.com/FreedomUniversity.TV
http://www.Twitter.com/FreedomUTV