use substitution to solve each linear system.

asinus without login

-x+y=1
2x + y=4

what is the solution?

\(-x+y=1\)

           \(y=x+1\)

\(2x+y=4\)

          \(2x+(x+1)=4\)

          \(3x=3 \)

\(x=1\)       !

          \(y=x+1\)

\(y=2\)       !