2000004001

Level: 
Project ID: 
2000004001
Accepted: 
0
Clonable: 
0
Easy: 
1
Identify which of the following systems of equations has infinitely many solutions.
\[\begin{aligned} x - y & = 5 & & \\2x - 2y & = 10 & & \end{aligned}\]
\[\begin{aligned} x - y & = 5 & & \\3x - 3y & = 10 & & \end{aligned}\]
\[\begin{aligned} x - y & = 5 & & \\-x +y & = 5 & & \end{aligned}\]
\[\begin{aligned} x - y & = 5 & & \\2x +2y & = 10 & & \end{aligned}\]