To analyze the equation \( 8x - 3y = 2x + 9y \), let's look at the statements provided:
1. **8 is the only factor of 8x.**
2. **8 is the only factor of 8 x.** (This is the same statement as the first, just with a space.)
Both of these statements are incorrect. While 8 is a factor of \( 8x \), it is not the only factor—1 is also a factor.
3. **There are four variables.**
This statement is incorrect. The equation contains two variables: \( x \) and \( y \).
4. **8, −3, 2, and 9 are coefficients.**
This statement is correct. In the equation, 8 is the coefficient of \( x \) in \( 8x \), -3 is the coefficient of \( y \) in \( -3y \), 2 is the coefficient of \( x \) in \( 2x \), and 9 is the coefficient of \( y \) in \( 9y \).
5. **8, −3, 2, and 9 are constants.**
This statement is incorrect. Coefficients are not constants; they are multipliers of the variables in this context.
Thus, the correct statement is: **8, −3, 2, and 9 are coefficients.**