Mike and Ted planted tomatoes.  In the morning, Mike planted 50 tomato seeds while Ted planted twice as much as Mike.  In the afternoon, Mike planted 60 tomato seeds while Ted planted 20 fewer tomato seeds than Mike. How many tomato seeds did they plant altogether?
Ted planted 2 x 50 = <<2*50=100>>100 tomato seeds.
So, Mike and Ted planted 50 + 100 = <<50+100=150>>150 tomato seeds in the morning.
In the afternoon, Ted planted 60 - 20 = <<60-20=40>>40 seeds.
Thus, Mike and Ted planted 60 + 40 = <<60+40=100>>100 tomato seeds in the afternoon.
Therefore, they planted 150 + 100 = <<150+100=250>>250 tomato seed altogether.
#### 250