Posted by **Stacy** on Saturday, May 14, 2011 at 11:17pm.

Write an equation which models how old in years each of you will be when you are three times as old as the younger person. My age is 30, my son is 6.

- Math -
**Mgraph**, Saturday, May 14, 2011 at 11:23pm
30+x=3(6+x)

- Math -
**Jai**, Saturday, May 14, 2011 at 11:28pm
first observe that you are 24 years older than your son. also, since we are required of the ages, we represent these unknown ages using variables:

let x = your son's age

let x+24 = your age

note that when your son's age is x years, you are three times as old. therefore,

3x = x+24

3x-x = 24

2x = 24

x = 12 years old (age of your son)

and your age is

x+24 = 36 years old

checking: note that 12*3 = 36, which satisfies the condition given.

hope this helps~ :)

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