<span>Scientists choose where are units of time began and ended based on major changes in life forms at certain times</span>
Answer:
My name's Bonita.
You might be like... "Don't expose that" but who cares.
16m -12 - m + 5 = - 52
16m - m = - 52 - 5 + 12
15m = - 45
m = -45 / 15
m = -3
