Question 256343
{{{4x+2y=8}}}
{{{y=-2x+4}}}
Substitute directly for y in the first equation using the second.
{{{4x+2y=8}}}
{{{4x+2(-2x+4)=8}}}
{{{4x-4x+8=8}}}
{{{8=8}}}
The two lines are the same line, infinite number of solutions.