SOLUTION: hi, i need some help with these equations and if possible express the answer as on ordered pair.... x-y=4 2x+y=5 thanks in advance for the help!!

Algebra ->  Systems-of-equations -> SOLUTION: hi, i need some help with these equations and if possible express the answer as on ordered pair.... x-y=4 2x+y=5 thanks in advance for the help!!      Log On


   

Question 58070: hi, i need some help with these equations and if possible express the answer as on ordered pair....
x-y=4
2x+y=5
thanks in advance for the help!!
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
1st: x-y=4
2nd: 2x+y=5
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Add 1st and 2nd to get:
3rd: 3x=9
x=3
Substitute into 1st or 2nd to solve for y, as follows:
3-y=4
y=-1
Solution: (3,-1)
Cheers,
Stan H.