SOLUTION: Solve by using the substitution method x+y=56 x+3y=56

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Question 345586: Solve by using the substitution method
x+y=56
x+3y=56
Found 2 solutions by rfer, Fombitz:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
56-y+3y=56
2y=0
y=0
-----------------
x=56
-----------------

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.x%2By=56
2.x%2B3y=56
From eq. 1,
y=56-x
3y=168-3x
Substitute into eq. 2,
x%2B168-3x=56
-2x=-112
highlight%28x=56%29
Then from eq. 1,
56%2By=56
highlight%28y=0%29