202k views
5 votes
Joan,s age is triple the age of her daughter. If Joan is 42 years old, how old is her daughter

User Fred Wu
by
7.7k points

2 Answers

1 vote
Let us take the age of Joan’s daughter as x

Joan is triple the age of her daugter.
Thus, Joan = 3x (1)

Joan’s age is 42 (2)

Let’s combine 1 and 2

42=3x
x=42/3
x=14

Her daughter is 14 years old.

User Amoran
by
8.2k points
1 vote

42 is 3 times 14.

Joan's daughter is 14 years old.

_____

If you know your times tables, you know 42 = 6·7. Since you're familiar with the associative property of multiplication, you know you can regroup the factors of this:

... 42 = 6·7 = (3·2)·7 = 3·(2·7) = 3·14

Of course, you can always simply divide 42 by 3 using your calculator or even long division.

User Tessa
by
8.7k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.