the man spend two seventh of his pay and left him with $210 how much money he have

3 answers

Nonsense.

He have $210.
If you want to know how much money he started with then "Let x represent the total amount"
Now 2/7 is gone, so 5/7 is still there (and this is $210)
x(5/7)= 210
Now re-arrange to get x alone : )
that is, multiply both sides by 7/5
x = his original amount : )
He had $X.
x - (2/7)x = (5/7)x left.
(5/7)x = $210.
5x/7 = 210,
5x = 1470,
X =