SOLUTION: Please help me to solve the system: r+d=9 r-d=-5

Question 234055: Please help me to solve the system: r+d=9
r-d=-5

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
solve the system:
r+d=9
r-d=-5
-----------
Add the two equations and solve for "r":
2r = 4
r = 2
-------------
Substitute into r+d = 9 to solve for "d":
2+d = 9
d = 7
-------------------
Cheers,
Stan H.

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