SOLUTION: state whether addition, subtraction substitution would be most convenient to solve each system of equations. then solve the system x-y=1 x+y=3

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Question 695976: state whether addition, subtraction substitution would be most convenient to solve each system of equations. then solve the system
x-y=1
x+y=3
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
ADDITION.
x-y=1
x+y=3
--------------
2X=4
X=4/2
X=2 ANS.
2-Y=1
-Y=1-2
-Y=-1
Y=1 ANS.
PROOF:
2+1=3
3=3