Question 354991
y = 4x +3 
...
20x - 5y = -15
/5
4x-y=-3
y=4x+3
both the lines are same.

..
{{{graph(300,300,-10,10,-10,10,(4x+3),(4x+3))}}}

only one line will be visible in the graph. the line intersects the the y axis at (0,3)
there are infinitely many solutions to the system of equations