Adecreased by 10%
express using algebra.

a=x/10

Step-by-step explanation:

x is the number you are finding 10 percent of and dividing by 10 is how you get 10 percent

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads