Question 887206
Filling rates in units, TUBs per MINUTE:
Cold, {{{1/9}}}
Hot, {{{1/10}}}
Drain, {{{-1/5}}}


If the rate of all three together is positive, then the tub can be filled that way.  Otherwise, the tub cannot be filled that way.


SUM THE RATES!


{{{1/9+1/10+(-1/5)}}}
?