30 pupils were each assigned to fold an equal number of paper hearts for a charity drive. 3 of them were unwell and did not fold any paper hearts. The remaining pupils had to fold an additional 5 paper hearts each. How many paper hearts did each pupil had to fold at first? Ans: ___

1. Find the number of remaining pupils who had to fold the extra hearts.

Number of remaining pupils = $30 - 3 = 27$

2. Calculate the total number of additional hearts folded by the remaining pupils.

Total additional hearts = $27 \times 5 = 135$

3. Determine the number of hearts each pupil had to fold at first.

The $135$ additional hearts were originally supposed to be folded by the $3$ unwell pupils.
Number of hearts each pupil had to fold at first = $135 \div 3 = 45$