Final answer:
To find a number 5 units to the left of 12 on the number line, subtract 5 from 12 to get 7.
Step-by-step explanation:
To find a number that is 5 units to the left of 12 on the number line, we need to subtract 5 from 12. So, 12 - 5 = 7. Therefore, the number that is 5 units to the left of 12 is 7.
The equation to represent this number is m = 12 - 5.
Learn more about Finding a number on the number line