Tushar Chandra Educator since 2010 12,619 answers | Certified Educator Share Link Share Page Citation Cite The function f(x)=3x+2. To find f(2a+b), substitute x with 2a + b f(2a + b) = 3(2a + b) + 2 => 6a + 3b + 2 The required value of f(2a + b) = 6a + 3b + 2 Approved by eNotes Editorial Team