SOLUTION: find x and y. y=x+4 y=3x-2y=-7

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Question 218114: find x and y.
y=x+4
y=3x-2y=-7
Answer by drj(1380) About Me  (Show Source):
You can put this solution on YOUR website!
Find x and y.

y=x+4 or -x+y=4
3x-2y = -7

Solving yields the following steps:

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++-1%5Cx+%2B+1%5Cy+=+4%2C%0D%0A++++3%5Cx+%2B+-2%5Cy+=+-7+%29%0D%0A++We'll use substitution. After moving 1*y to the right, we get:
-1%2Ax+=+4+-+1%2Ay, or x+=+4%2F-1+-+1%2Ay%2F-1. Substitute that
into another equation:
3%2A%284%2F-1+-+1%2Ay%2F-1%29+%2B+-2%5Cy+=+-7 and simplify: So, we know that y=5. Since x+=+4%2F-1+-+1%2Ay%2F-1, x=1.

Answer: system%28+x=1%2C+y=5+%29.



I hope the above steps and explanation were helpful.

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

Also, good luck in your studies and contact me at john@e-liteworks.com for your future math needs.

Respectfully,
Dr J

http://www.FreedomUniversity.TV