ontili shared his money his three sons. The first son received 1/3 of the money, the second one got 1/5 of it and the third son got 1/4 of the remainder. If ontili remained with sh. 210000, how much did the first son received?

Answer 1

It would help if you proofread your questions before you posted them.
Does "it" refer to the remainder or original total?

Answer 2

M=M/3+M/5+M(1-1/3 -1/5)/4+210000
solve for M money the total. First son got1/3