SOLUTION: What is the system and it's solution of x+4y=12 y=-x

Question 220890: What is the system and it's solution of
x+4y=12
y=-x
Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
What is the system and it's solution of
x+4y=12 Equation A
y=-x OR -x-y=0 Equation B

Step 1. Add the above linear equations A and B yields x+(-x)+4y+(-y)=12+0 or 3y=12.

Step 2. Dividing 3 to both sides of the equation

and

Step 3. Check B: -4+4*4=12... a true statement.

Step 4. ANSWER: The solution is x=-4 and y=4 or (-4,4).

I hope the above steps were helpful.

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

Good luck in your studies!

Respectfully,
Dr J

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