Question 889269: Sandy is 7 years younger than Mandy. In 4 years time she will be half Mandy’s age.What is the sum of their ages now? Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! Sandy is 7 years younger than Mandy. In 4 years time she will be half Mandy’s age.What is the sum of their ages now?
***
let x=Mandy's age
x-7=Sandy's age
..
In 4 yrs:
x+4=Mandy's age
x-7+4=x-3=Sandy's age
x-3=(x+4/2
2x-6=x+4
x=10
x-7=3
Mandy's age=10
Sandy's age=3
What is the sum of their ages now? 13
(