<human>:  Ten more than twice the number of birds on the fence is 50. How many birds are on the fence?
<bot>: Define a variable ** Let x be the number of birds on the fence. We know that 10 + 2*x = 50.
Simplify ** Subtracting 10 from both sides, we get 2*x = 50 - 10 = 40
Divide by 2 ** Dividing both sides by 2, we get x = 20
#### 20