Combine terms: 12a + 26b -4b – 16a

Step-by-step explanation:

combine terms: 12a + 26b -4b – 16a

the two may have that, even a breakdown is probably offered

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