2. Select all the systems of equations that have exactly one solution.
(Select 2) *
8 points
A.
S y = 3x + 1
y=-3x +7
B. S y = 3x+1
y=x+1
A
B
C.
S y = 3x + 1
D.
y = 3x +7
y=-x+ 10
y = 1x + 10
С
D