Question

I can't pay you
(Change to Affirmative)

Answer 1

Question : I can't pay you

(Change to Affirmative)

Answer :

I am unable to pay you.

While changing a negative sentence into positive sentence, do not change the meaning of the sentence. Keep the meaning as it is. For example :

He is bad. ( Change to affirmative ) Answer : He is not good.

Thus, Likewise, Answer of the question is : I am not able to pay you.

Answer 2

$\mathfrak{\huge{Answer:}}$

$\bold{\huge{I\:am\:unable\:to\:pay\:you.}}$

$\underline{\tt{Reason:}}$ When we are given the task of changing a negative sentence ( The sentence which contains negative words like : no, not, neither, never, etc. ), into a positive one, we generally find the synonyms of the words ( including the negative words ).

For example :- He is $\bold{not\:rich}$.

The synonym of not rich =》 $\bold{poor}$

Thus, the affirmative sentence will be :- He is poor.

Use the comments section for remaining doubts! :)