SOLUTION: Solve the system of equations by graphing. Then classify the system. x+y=7 and x-y=5.

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Question 560027: Solve the system of equations by graphing. Then classify the system. x+y=7 and
x-y=5.
Answer by Maths68(1474) About Me  (Show Source):
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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
=====
Put the values of x and y in (1)
x+y=7
6+1=7
7=7
Put the values of x and y in (2)
x-y=5
6-1=5
5=5