Answer:
[tex]x=b-1\\y=2b-1[/tex]
Step-by-step explanation:
We have a 2x2 equation system. First, rewrite it like this:
[tex]-2x+y=1\hspace{5}(1)\\-x+y=b\hspace{5}(1)[/tex]
Solving the system using elimination method:
(1)-(2)
[tex]-2x-(-x)+y-y=1-b\\x=b-1\hspace{5}(3)[/tex]
Replacing (3) in (2)
[tex]-(b-1)+y=b\\[/tex]
Adding (b-1) to both sides:
[tex]y=b+(b-1)=b+b-1=2b-1[/tex]
