{y=x-2}
4x+y=8
Use substitution.
put the first equation into the second, so...
4x + (x-2) = 8 then take it from there
once you get x, put that back into the first equation.
4x+y=8
put the first equation into the second, so...
4x + (x-2) = 8 then take it from there
once you get x, put that back into the first equation.