Question

Alexandria is 45. She is also 6 less than three times Kira's age. How old is Kira?

Answer 1

`17`

Explanation:

Let's make an equation

Let the age of Kira be `k`
`3` times her age would be `3k`
And Alexandria's age would equal `3k-6`

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Then,

`rarr45=3k-6`

Add `6` both sides

`rarr45+6=3k-6+6`

`rarr51=3k`

Divide both sides by `3`

`rarr51/3=(cancel3k)/cancel3`

`color(green)(rArr17=k`

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

So Kira's age is `17`