SOLUTION: solve by the elimination method 0.3x-0.2y=4 0.2x+0.5y= -21/23

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Question 212828: solve by the elimination method
0.3x-0.2y=4
0.2x+0.5y= -21/23
Answer by drj(1380) About Me  (Show Source):
You can put this solution on YOUR website!
Solve by the elimination method
0.3x-0.2y=4
0.2x+0.5y= -21/23
The following steps solves the problem using Substitutions:

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
We'll use substitution. After moving 0.2*y to the right, we get:
3%2Ax+=+4+-+0.2%2Ay, or x+=+4%2F3+-+0.2%2Ay%2F3. Substitute that
into another equation:
0.2%2A%284%2F3+-+0.2%2Ay%2F3%29+%2B+0.5%5Cy+=+-0.91304347826087 and simplify: So, we know that y=-2.42406194163192. Since x+=+4%2F3+-+0.2%2Ay%2F3, x=1.49493746277546.

Answer: system%28+x=1.49493746277546%2C+y=-2.42406194163192+%29.




I hope the above steps were helpful.

For Step-By-Step free videos in Introduction to Algebra, please visit
http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry visit
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Good luck in your studies!

Respectfully,
Dr J