333 years ago, the residents of planet xxx found a black hole leading to another galaxy. since then, they have been leaving planet xxx at a rate of 120120120 residents per year.
the following equation describes this situation:
\quad -120\cdot 3 = -360−120⋅3=−360minus, 120, dot, 3, equals, minus, 360
what does -360−360minus, 360 tell us?