spends 30% buying a computer, by the 10% of the remaining, he pays his electricity bill. If he pays $140 in paying the bill, how much he had in the start?

Question

please answer this question

Answer 1

Let x = starting amount

 

Amount remaining after buying the computer = x - 0.3x = 0.7x

 

0.10(0.7x) = 140

 

0.07x = 140     x = $2000