Question

meijun had some money. she used 1/3 of it on a watch and 1/9 of it on a gift. the watch and the gift cost $144 altogether. how much money did she have at first?

Answer 1

$324

Explanation:

let x be the amount of money she had at first , then

`(1)/(3)` x +
`(1)/(9)` x = 144 ( multiply through by 9 to clear the fractions )

3x + x = 1296

4x = 1296 ( divide both sides by 4 )

x = 324

she had $324 at first