Venuraam's answer to Vivi's Primary 5 Maths Whole Numbers Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Venuraam
Venuraam's answer
5 answers (Tutor Details)
1st
How I got the equation:

After Jake gave Calvin 4 marbles, Calvin and twice the number of marbles as Calvin. So that means if you wanna equate Calvin's marbles to Jake's marbles, Jake has to multiply his marble count by 2 for it to be equal to Calvin's