Question

some friends went to a hotel. the bill received was 2400. two friends forgot their wallets at home so the others had to pay 100 each, more. Find the number of friends

Answer 1

LET THE NUMBERE OF FRIEND WENT AT HOTESL=X
=>BILL PER HEAD= 2400/X
BUT..
  2 FRIEND FORGET TO BRING WALLET
  =>NOW BILL BER HEAD=
  2400/X +100
  2400/X=2400/X+100
 SOLVE EYATION AND YOU ARE DONE