To solve the equation:

8/11 + x = 3 9/11

First, we need to subtract 8/11 from both sides:

x = 3 9/11 - 8/11

Next, we need to find a common denominator for the fractions on the right-hand side. The smallest common multiple of 11 and 1 is 11, so we can rewrite the fractions as:

x = (33/11) - (8/11)

x = 25/11

Therefore, the solution to the equation is:

x = 25/11 or approximately 2.27

Ответ:

8:11+х=39:11

1+х=39:11

1+х=4

х=4-1

х=3