Question 48582
{{{ ( (x+4)/(7) ) + ( (15-x)/(12) ) }}}


Lowest common denominator of 7 and 12 is 84.


{{{ ( (12(x+4))/(84) ) + ( (7(15-x))/(84) ) }}}
{{{ ( (12x+48)/(84) ) + ( (105-7x)/(84) ) }}}
{{{ ( (12x+48)+(105-7x) )/(84) }}}
{{{ (5x+153)/(84) }}}


Here you go.


Jon