To solve the equation 3x + 6x = 1, you first combine like terms. The terms 3x and 6x can be added together, which gives:
3x + 6x = 9x
This simplifies the equation to:
9x = 1
The next step is to isolate x. You can do this by dividing both sides of the equation by 9:
x = 1/9
So, the solution for x is:
x = 0.111… (approximately)
This means x is a repeating decimal, but it can also be expressed as a fraction as 1/9.