SOLUTION: The directions say to solve the system r-s=-3 r+s=9

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Question 7607: The directions say to solve the system
r-s=-3
r+s=9

Answer by bonster(299)   (Show Source): You can put this solution on YOUR website!
r-s=-3
r+s=9
add the two, and you'll get:
2r=6
=
r=3

In order to figure out the value of s, we need to multiply one set by -1
r-s=-3 -->
r+s=9 -->r+s=9

add the two and you'll get:
2s=12
=
s=6


r=3, s=6

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