0.8 - 4x = -0.4y
6x + 4.0y = 4.2


Which of the following shows the system with like terms aligned?
a.) -4x - 0.4y = -0.8 6x + 0.4y = 4.2
b.) -4x + 0.4y = 0.8 6x + 0.4y = 4.2
c.) -4x + 0.4y = -0.8 6x + 0.4y = 4.2
d.) -4x + 0.4y = -0.8 6x - 0.4y = 4.2