Question 1150025
Let {{{ t }}} = time in days for Victoria to do the job alone
Add their rates of working to get rate working together
[ 1 job / 26 days ] + [ 1 job / t days ] = [ 1 job / 13 days ]
{{{ 1/26 + 1/t = 1/13 }}}
{{{ 1/26 + 1/t = 2/26 }}}
{{{ 1/t = 1/26 }}}
{{{ t = 26 }}} days