Question 518315: x+y=7
x-y=5
Answer by Maths68(1474)   (Show Source):
You can put this solution on YOUR website! x+y=7......(1)
x-y=5......(2)
Add (1) and (2)
x+y=7
x-y=5
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2x=12
2x/2=12/2
x=6
Put the value of x in (1)
x+y=7
6+y=7
y=7-6
y=1
(x,y)=(6,1)
Check
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x+y=7
Put the value of x and y in above equation
6+1=7
7=7
x-y=5
Put the value of x and y in above equation
6-1=5
5=5
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