Laravel foreach in one collection?

i have an relationship like

+------------+---------+
|    id      | problem |
+------------+---------+
| 1          | problem |    
+------------+---------+


+------------+----------+---------+
|    id      | problemid|solution |
+------------+----------+---------+
| 1          |  1       |solution1|    
+------------+----------+---------+
| 2          |  1       |solution2| 
+------------+----------+---------+

I have done an join and the problem is when i do an foreach in view i get 2 collection with the same problem and 2 different solutions but i need to get the same problem(one problem) and 2 solution.How can i do it?

Here is the code in Controller:

$problem=Problem::select()->join('solution','problem.id','=','solution.problemid')
                            ->where('solution.id',$id)->get();

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