Consider the following system:
x=2y+5
4x-8y=20
When solving this system by the substitution method, 20=20 is obtained. What is the solution set?
A.
The solution set is {}. (Type an ordered pair.)
B.
There are infinitely many solutions. The solution set is {(x,y)|x=2y+5} or {(x,y)|4x-8y=20}
C.
The solution is empty set.
If the system is solved by graphing, two lines that
A. are identical (or coincide)<
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