Question

Solve the following system of equations
x+7y= 8 (1)
x=4-7y (2)

Answer 1

since (2) is already solved for x, we might as well use substitution; sub-ing (2) into (1)
(4-7y)+7y=8
4=8
the contradiction implies "no solution"; this means that the lines do not intersect because they are parallel.

Answer 2

cool great answer i was stuck on that question all day thank you Mandolino

Answer 3

here is the graph of the two lines