Answer: 4sr+17r−2s4+17−2
Step-by-step explanation: simplify 18r - 3s-r + 4s1r+s
then multiply by one and get 18r-3s-r+4sr+s.
then combine like terms and get 17r-3s-r+4sr+s.
combine like terms again and end up with 17r-2s+4sr
you then want to rearrange the terms to 4sr+17r-2s
and you have your answer .