Simple Puzzle: A Matter Of Time I am trying to solve a simple puzzle:
Fifty Minutes ago if it was four times as many minutes past three O'clock, how many minutes is it to six O'clock.
I tried solving it:
Let x be the minutes past 5,
then 120 + x - 50 = 4x 
which gives the wrong answer.
The correct solution has the formulation 180 - 50 -x = 4x which gives x = 26 and is the correct answer.
Am I doing weird thing by assuming that x is the minutes past 5 ? My approach is same as the one with correct solution if I use 4(60 -x) on the LHS but why should I ?
Is it that the puzzle is wrong in its formulation or am I missing something and hence am unable to arrive at the correct solution ? 
By the way, the puzzle is from a famous book by Shakuntala Devi and hence I am forced to doubt the validity of my approach.

The problem (it appeared here already before, but without the strange "if") is worded in a completely misleading way. Maybe a mathematical moron from the assessment industry had it translated by Babelfish from a japanese or chinese source.
The sentence "Fifty minutes ago [if] it was four times as many minutes past three o'clock" can only be interpreted as "Fifty Minutes ago it was four times as many minutes past three o'clock than it is now" because no other point of comparison is given. If it is now $x$ minutes past three o'clock this means that
$$720+x-50=4x\ ,$$
or $x=3{\rm h}\>43'\>20''$. It follows that it takes another $$11{\rm h}\>16'\>40''$$ until six o'clock.
