Answer:
xx=-0.8
Step-by-step explanation:
not sure if this is right because the 12xx is kind of strange
12xx+16-1=012xx+15=012xx=-1512/12xx=12/-15xx=-.8
Answer
Haven't done this for a bit but I think it's 19
2 * 2 * 2 = 8
27 - 8 = 19