SOLUTION: x + 3y = 7 -x + 4y = 7

Question 299693: x + 3y = 7
-x + 4y = 7
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
x + 3y = 7
-x + 4y = 7 add
-----------------
7y=14
y=14/7
y=2 ans.
x+3*2=7
x+6=7
x=7-6
x=1 ans.
Proof:
-1+4*2=7
-1+8=7
7=7
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