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January 31, 2015

January 31, 2015

Posted by on Wednesday, May 26, 2010 at 3:25pm.

3r - 5s = -27

5r + 3s = 23

- algebra -
**Jen**, Wednesday, May 26, 2010 at 3:37pmmultiply the top by 3 and the bottom by 5 to eliminate the s's

9r-15s=-81

25r+15s=115

add the rows together

34r=34

divide both sides by 34

r=1

plugging in r=1 to either equation

5+3s=23

subtract 5 from both rows

3s=18

s=6

solution: r=1, s=6

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