Answer: A. 5
Explanation:
First you simplify.
3x+2-3x+7+5x
3x and -3x cancel each other out. In other words eliminate the opposites.
2+7+5x
Add like terms. 2+7=9.
The simplified expression is 5x+9.
A coefficient is a numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g. 4 in 4x y).
So the coefficient for the simplified expression would be 5.