SOLUTION: use the substitution method or liner combinations to solve the liner system and tell how many solutions the system has 1)x+y=-1 x+y=8

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Question 262777: use the substitution method or liner combinations to solve the liner system and tell how many solutions the system has
1)x+y=-1
x+y=8
Answer by richwmiller(17219) About Me  (Show Source):
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This system has no solutions
since x+y =-1 and x+y=8
and -1 doesn't equal 8
they are parallel lines that never intersect.