Posted by **Lorri** on Friday, July 9, 2010 at 12:40am.

elimination method really confuses me.

solve by elimination method

5r -3s = 17

3r + 5s =17

A. solution is ______ (ordered pair, integer or fraction)

B. Infinitely many

C. No Solution

- math elimination method -
**Reiny**, Friday, July 9, 2010 at 8:58am
try to get either the x or the y coefficients to be alike

in this case I will get the y's to have a 15 in front

so multiply the first by 5 and the second by 3 to get

25r - 15s = 85

9r + 15s = 51

add them

34r = 136

r = 136/34 = 4

back in second, (or first)

3(4) + 5s = 17

12 + 5s = 17

5s = 5

s = 1

- math elimination method -
**Christy**, Friday, July 9, 2010 at 12:54pm
thank you so much, i was not even close

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