Question 136164
Given: {{{2y=x+3}}} and {{{x=y}}}

Use the value for x given in the second equation, and substitute it into the first equation.
{{{2y=x+3}}}
{{{2y=y+3}}}
{{{y = 3}}}

{{{graph(600,400,-10,10,-10,10,x,(x+3)/2)}}}