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December 18, 2014

December 18, 2014

Posted by **Cassie** on Tuesday, September 8, 2009 at 6:21am.

3r - 7s =-29

7r + 3s = 29

What is the solution of the system?

Type an ordered pair. Type an interger or a fraction or type N if there is no solution or type 1 if there are infinitely many solutions.

- algebra -
**Dr Russ**, Tuesday, September 8, 2009 at 6:36amThis can be solved as there are two unknowns and two equations.

I would multiply the top by 3 and the bottom by 7 and then add the two equations together.

9r-21s=87

49r+21s=203

add

58r=290

r=5

subsiitute in the first equation

15-7s=29

7s=-14 so s=-2

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