SOLUTION: a + 9b=4 a + 4b= -1 solve by the elimination method

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Question 713753: a + 9b=4
a + 4b= -1
solve by the elimination method
Found 2 solutions by Alan3354, checkley79:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
a + 9b=4
a + 4b= -1
---------------- Subtract

Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
a + 9b=4
a + 4b= -1 SUBTRACT.
-----------------------------
5b=5
b=5/5
b=1 ans.
a+9*1=4
a+9=4
a=4-9
a=-5 ans.
proof"
-5+4*1=-1
-5+4=-1
-1=-1