There are 12,000 people attending a concert. They announce that 20% of the people that purchased tickets did not come to the concert. How many people purchased tickets to the concert? (Quickly answer this if possible ​

15,000

Step-by-step explanation:

20% of 15,000 is 3,000. 15,000-3,000=12,000

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^