Need some help on this problem thanks very much

Question

a printer knows that a page of print contains 1291 words if large type used 1541 words of type is used.  A document containing 23070 words fills exactly 16 pages.  find how many pages are in each

Answer 1

b represents the number of pages with big type

s represents the number of pages with small type

 

b + s = 16

1291b + 1541s = 23070

 

Use substitution (my choice) or elimination to determine the number of each.