Answer:
5x - 1
Step-by-step explanation:
(f + g)(x) = f(x) + g(x), thus
f(x) + g(x)
= 3x - 2 + 2x + 1 ← collect like terms
= 5x - 1
7xy+2x+3+3xy
7xy+3xy+2x+3 ( combine like terms)
7xy+3xy=10xy
Answer: 10xy+2x+3