Problem
Solve the linear equation. \[ 6 x+9=4 x+45 \] Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution set is (Type an integer or a simplified fraction.) B. The solution set is $\{x \mid x$ is a real number $\}$. C. The solution set is $\varnothing$. (1) Time Remaining: 01:05:39
Solution
Step 1 ：Subtract 4x from both sides of the equation to get \(2x + 9 = 45\).
Step 2 ：Subtract 9 from both sides to get \(2x = 36\).
Step 3 ：Divide both sides by 2 to solve for x, so the solution is \(x = 18\).
Step 4 ：Final Answer: The solution set is \(\boxed{18}\).
