How to work with JSONB column I use Postgres and jsonB column

I have the following table:

id(VAARCHAR(64)) | value(JSONB)
--------------------------------
1                |[{"x": "10", "y": 1}, {"x": "32110", "y": 12}] 


X has always unique 

I can add a new element in this sequence.

I can check that sequence contains the element with x value "10" or not.

But I can't 
**Remove element with the special value of x (remove value which contains x:"10")?

Find the maximum value of y?**

Can anybody help me with this?
Is a remove   

 UPDATE table_name
    set jsonB_column_name=(SELECT jsonb_agg(z.a)
                                   FROM  (SELECT jsonb_array_elements(t.jsonB_column_name) as a
                                          FROM   table_namet
                                          where id='3a-a7ed-bf88dcdde0ab') z
                                   WHERE NOT a @&gt; '{"x":"10"}')
    where id='1';


Is a search

select max(c.jsonb-&gt;&gt;'y')
from (SELECT jsonb_array_elements(t.jsonB_column_name) as jsonb
      FROM   table_namet) as c;