Solve the equation. 3x-(4x+5)=9x-15 Select the correct choice below and fill in any answer boxes in your choice. A. The solution set is {}. (Simplify your answer.) B. There is no solution.

Let's solve the equation step by step: Given: \[ 3x - (4x + 5) = 9x - 15 \] First, distribute the negative sign: \[ 3x - 4x - 5 = 9x - 15 \] Combine like terms on the left side: \[ -x - 5 = 9x - 15 \] Next, add \( x \) to both sides to get all the \( x \) terms on one side: \[ -5 = 10x - 15 \] Now, add 15 to both sides: \[ 10 = 10x \] Finally, divide by 10: \[ x = 1 \] The solution is \( x = 1 \). Therefore, the correct choice is: A. The solution set is \(\{1\}\).