Question 634463
Add their rates of painting
( 1 living room ) / ( 2 hrs ) + ( 1 living room ) / ( 3 hrs ) = ( 1 living room ) / ( x hrs )
{{{ 1/2 + 1/3 = 1/x }}}
Multiply both sides by {{{ 6x }}}
{{{ 3x + 2x = 6 }}}
{{{ 5x = 6 }}}
{{{ x = 6/5 }}}
This is 1 + 1/5 or 
1 hour and 12 minutes with both painting