5. Select all equations that can result from adding these
two equations or subtracting one from the other.
A. -2x - 4y = 8
B. -2x+6y=8
C. 4x - 4y = 16
D. 4x + 4y = 16
E. 2x6y=-8
F. 5x - 4y = 28
(From Unit 2, Lesson 14.)
fx + y = 12
3x-5y=4