How many solutions does the system of equation have?

Question

x-4y =12 and 5x-20y =60

Answer 1

http://www.jiskha.com/display.cgi?id=1419375722

Answer 2

same slope, same y intercept so lines on top of each other, infinite number of points

Answer 3

for heavens sake put your lines in the form y = m x + b and see if they have different m, slope
then if so, see if b is the same for both.