SOLUTION: using substitution or elimination, find x and y 3x+y=1 y=x+9

Question 224262: using substitution or elimination, find x and y
3x+y=1
y=x+9
Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
Using substitution or elimination, find x and y

3x+y=1
y=x+9 or -x+y=9

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION

Solve:
We'll use substitution. After moving 1*y to the right, we get:
, or . Substitute that
into another equation:
and simplify: So, we know that y=7. Since , x=-2.

Answer: .

I hope the above steps and explanation 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.

And good luck in your studies!

Respectfully,
Dr J

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