Answer:
3f + 8g
Explanation:
6f + 5g - 3f + 3g
Combine like terms. In essence, if the term has the same variable (letter part) then perform the operation between two coefficients. The final answer should compose of two parts, each with a different variable.
6f + 5g - 3f + 3g
Organize this expression such that the like terms are next to each other,
6f - 3f + 5g + 3g
Simplify,
3f + 8g
Since the terms are unlike, one cannot simplify any further.