math
posted by joyce on .
Lexi and Marie had $250 altogether. After Lexi spent 2/5 of her money and Marie spent $40, they had the same amount of money left. how much money did Lexi have in the beginning ?

let x = amount of money of Lexi
let 250  x = amount of amount of Marie
then set up the equation:
x  (2/5)x = 250  x  40
(3/5)x = 210  x
(3/5)x + x = 210
(8/5)x = 210
x = 210*(5/8)
x = $ 131.25 (Lexi's money)
250  x = 118.75 (Marie's money)
hope this helps~ :) 
$100