SOLUTION: What is the solution set for x+y+7 and x-y+1?

Algebra ->  Matrices-and-determiminant -> SOLUTION: What is the solution set for x+y+7 and x-y+1?      Log On


   

Question 194183: What is the solution set for x+y+7 and x-y+1?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=7
x-y=1 add.
------
2x=8
x=8/2
x=4 ans.
4+y=7
y=7-4
y=3 ans.
proof:
4-3=1
1=1