兄はその複雑な問題を解くことができなかった。の英語

My brother could not solve the complicated problem.

It is difficult for me to solve that problem.

It was difficult solving this problem.

It was very difficult to solve that problem.

This problem is difficult for me to solve.

Solving this problem was difficult for me.

I found it difficult to solve the problem.

I understood that solving that problem is difficult.

The problem was too much for me.

I had difficulty in solving this problem.

This problem is too difficult for me to solve.

The problem exacted a great effort to solve it.

I found great difficulty in solving this problem

I found it very difficult to solve this problem.

This problem is difficult for me to solve.

I couldn't solve all of the problems.

I could solve the problem without any difficulty.

I thought it impossible for him to solve the problem.

I can't solve this problem. It's too difficult for me.

I could not solve this problem by any means.

I just couldn't solve this problem.

I couldn't solve this problem by any means.

I just wasn't able to solve this problem.

I simply couldn't solve this problem.

It is impossible for me to solve the problem.

I can't work out the problem.

I couldn't solve this continuous process cost system problem.

I found out that it was difficult for her to solve that problem.

This problem is too difficult for me to solve.

It is impossible for me to solve that problem.