Ng Bee San's answer to Leow Wen Ze's Primary 6 Maths Algebra Singapore question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Note that if there are 20 more boys than girls, boys = n+10, girls = n-10
Date Posted:
3 years ago
360 Tutoring Program