Question 196175: 2x + y = 5
x - y = 4
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! (1) 2x +y =5
(2) x-y = 4 or y= (x-4)
substitute into (1)
2x + (x-4) =5
3x -4 =5
3x =9
x=3,,,ANSWER
substitute into (2)
y = (3) -4 = (-1) = y,,,,ANSWER
.
checking
(1) 2(3) +(-1) = 6-1 =5,,,,,ok
(2) (3) -(-1) = 3+1 = 4,,,,,ok
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