Question 698836
chris collected toys for charity. he donated 3/4 to charity A and then 1/3 of the remaining to charity B.
 After the two donations, Chris had 10 toys left. How many did Chris originally collect?
:
let x the original number of toys
:
x - {{{3/4}}}x = {{{1/4}}}x after the first donation
then after 1/3 of the remainder is donated you have:
{{{2/3}}}*{{{1/4}}}x = 10
{{{2/12}}}x = 10
2x = 12*10
2x = 120
x = 60  toys originally
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:
You can check this in the original equations