Question

solve the system by graphing
x=-y y+x=6
a. (1,1) b. (1,5) c. infinte number of solutions d. no solution

Answer 1

no solution

i.e. \[x=-y, y+x=6 \Rightarrow y+(-y)=6 \Rightarrow 0=6\]
clearly \[0\neq 6\]

Answer 2

of course I did not solve by graphing...