A set of equations is given below:
Equation S: y = x + 9
Equation T: y = 2x + 1
Which of the following steps can be used to find the solution to the set of equations?
1. Set the two equations equal to each other: x + 9 = 2x + 1
2. Solve for x: x - 2x = 1 - 9
3. Simplify: -x = -8
4. Solve for x: x = 8
5. Substitute the value of x back into one of the original equations to find y: y = 8 + 9 = 17
6. The solution to the set of equations is x = 8 and y = 17.