SOLUTION: solve the system using the substution method 5x-4y=-5 7x+y=21 solution (?/33,140/?)

Question 212892: solve the system using the substution method
5x-4y=-5
7x+y=21
solution (?/33,140/?)
Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
Solve the system using the substitution method

Solution (?/33,140/?) ANSWER (79/33, 140/33)

The following steps solves the set of equations by substitution.

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION

Solve:
We'll use substitution. After moving -4*y to the right, we get:
, or . Substitute that
into another equation:
and simplify: So, we know that y=4.24242424242424. Since , x=2.39393939393939.

Answer: .

Based on the above steps we have the following: x=2.3939... = 79/33 and y=4.2424...=140/33

where x = ?/33 = 2.3939... and y = 140/? = 4.2424...

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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