(x) / (1100 + x) *1 000 000 = 200
First divide both sides by 1 000 000:
(x) / (1100 + x) = 0.000 2
Multiply both sides by 1100 + x:
x = 0.0002(1100 + x)
x = 0.22 + 0.0002x
Subtract 0.0002x from both sides:
0.9998x = 0.22
Divide both sides by 0.9998:
x = 0.22 / 0.9998
This will become your answer. (It's a long decimal.)