+0  
 
0
85
1
avatar

Lily is twelve years old and her brother, Percy, is eight. How old will Percy be when the sum of their ages is forty?

 Jun 14, 2020
 #1
avatar+751 
+1

Let x be how much they have aged when the sum of their ages is 40.

12+x+8+x=40

20+2x=40

2x=20

x=10

Therefore Percy will be 8+10=18 years old when the sum of their ages is 40.

 Jun 14, 2020

51 Online Users

avatar