Question 105380: Solve the system by addition
x + y = 6
x – y = 4
Answer by Joeshie(9)   (Show Source):
You can put this solution on YOUR website! If you didn't know, you can not only add numbers and variables but whole equations!
To demonstrate this we can use your problem:
x + y = 6
x – y = 4
All you do to do this by addition, would be to add:
(x+y)+(x-y)=(6)+(4)
This would simplify into:
2x = 10
x = 5
Substitution:
5 - y = 4
Subtract 5 on both sides to get
-y = 4 - 5
Simplify:
-y = -1
y = 1
The solution is: (5,1)
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