Question 1208770
The two different expressions for y equal.


{{{-x+7=x+1}}}

{{{-x-x=1-7}}}

{{{-2x=-6}}}

{{{x=3}}}


Substitute into either original equation.
{{{y=x+1}}}

{{{y=3+1}}}

{{{y=4}}}


{{{system(x=3,y=4)}}}