Answer:
$70 spent altogether
Step-by-step explanation:
Since $20 is what Alex had left after spending 2/3 of the remainder, 20 must be 1/3 of the remainder, meaning the remainder would be 20 x 3, or $60 (and $40 was spent). As Alex had spent 1/3 of the pocket money and $60 was what was left after spending that, $60 must be 2/3 of the pocket money. We can divide 60 by 2, which gives $30, or 1/3 of the original as what he spent. $40 plus $30 is $70, so Alex spent $70 altogether.
I hope this helped! :)
