Show how to solve the following math problem in 3 steps.
3x + 4y = 9
Step 1: Subtract 4y from both sides, giving 3x = 9 - 4y
Step 2: Divide both sides by 3 to get x = 3 - 4/3y
Step 3: The set of solutions are {(x,y) | x = 3 - 4/3y}
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Show how to solve the following math problem in 3 steps.

### Response:
Step 1: Subtract 4y from both sides, giving 3x = 9 - 4y
Step 2: Divide both sides by 3 to get x = 3 - 4/3y
Step 3: The set of solutions are {(x,y) | x = 3 - 4/3y}