Sharita does special typing jobs for scientists. she charges $7 for the first 3 pages and $3 for each additional page of scientific typing. sonia, a biologist, paid $100 to have a research paper typed. how many pages long was sonia's paper?

Respuesta :

100 divided by 3 = 33 now 33 - 7 =26.
so she wrote 26 pages.