SOLUTION: 7x+7y=28 -7x+y=57 Solve by the substitution method

Question 227722: 7x+7y=28
-7x+y=57
Solve by the substitution method
Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
7x+7y=28
-7x+y=57

Solve by the substitution method

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION

Solve:
We'll use substitution. After moving 7*y to the right, we get:
, or . Substitute that
into another equation:
and simplify: So, we know that y=10.625. Since , x=-6.625.

Answer: .

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.

And good luck in your studies!

Respectfully,
Dr J
http://www.FreedomUniversity.TV
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