SOLUTION: 1. Solve by the elimination method 5r-7s=-3 7r+5s=55

Question 227306: 1. Solve by the elimination method

5r-7s=-3
7r+5s=55

Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
1. Solve by the elimination method

Equation A
Equation B.

Step 1. Multiply by 5 in Equation A and Multiply by 7 in Equation B to eliminate the s-terms after adding the Equations now given below:

Step 2. Adding the above equations yield the following.

Divide by 74 by both sides of the equation

Step 3. Substitute into Equation A

Add 7s+3 to both sides of the equation

Divide by 7 to both sides of the equation

Step 4. Substitute and into

Step 5. ANSWER: and

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

RELATED QUESTIONS
Solve by the Elimination Method. 7r - 5s = 11. 5r + 7s =... (answered by checkley77)

5r-7s=-6 7r+5s=36 solve by the elimination method (answered by stanbon)

Solve by the elimination method. 7r-5s=-12 5r-7s=76 What is the solution of the... (answered by jim_thompson5910)

Solve by the elimination method. 7r-5s=-12 5r-7s=76 What is the solution of the... (answered by checkley77)

Solve by the elimination method 7r-5s=2 5r+ 7s = 86 I really want to see how to... (answered by ankor@dixie-net.com)

5r-7s=-28 7r+5s=94 solve by the elimination method the solution it says is an ordered... (answered by richwmiller)

Solve by the elimination method. 7r - 5s =-18 5r + 7s = 40 Help me please. This is... (answered by scott8148)

solve by elimination method 7r-2s=31... (answered by oberobic)

Solve by the elimination method. 7r - 4s =24 4r + 7s =88 (answered by Alan3354)