What type of systems of equations have no solutions?
What is parallel lines
y = x + 4
y = 2x + 5
r + s = -6
r - s = -10
x = 4y
2x + 3y = 22
What is the solution 
What is parallel?
y = 3x - 2
y = -x - 2
The solution to the system:
x + y = 7
x - y = 3
What is (5, 2)?
y = x - 2
3x - y = 16
What is the solution?

What is (3,-2)
y = -3
x = 5
2x + 3y = 6
3x + 5y = 15
y = 3x - 1
7x + 2y = 37
What is the solution?

What is (4,-4) ?
y = (1/3)x - 3
2x - y = 8
2a - 4b = 12
-8a + 16b = -48
3s - 2t = 4
t = 2s - 1
The dimensions of a rectangle whose perimeter is 78 inches, when the length of the rectangle is twice its width
What is 26x13?
What type of solution happens when the graphs intersect?
What is infinite solutions?
y - 3x = 3
y = 3x - 2
The solution to the system:
7x-5y=-24
-9x+5y=18
What is (3, 9)
t + u = 12
t = (1/3)u