Math
posted by B.B. .
Can someone please help with this problem?
Solve by the elimination method.
7r9s= 58
9r+7s=74
I know that I need to multiply the first equation by 9 and the second equation by 7.
The equations look like this:
63r81s= 522
63r+49s=518
After this I get confused. Could someone please help?
Thanks.

subtract
0r130s=1040 
But how would I solve for r?
s=8 does that mean r=0?
Thanks. 
Never mind I got the answer for r.
Thanks.