Question 602370
Let {{{ x }}} = the number of years from now when
our ages add up to {{{ 150 }}}
{{{ 50 + x + 80 + x = 150 }}}
{{{ 2x + 130 = 150 }}}
{{{ 2x = 20 }}}
{{{ x = 10 }}}
In 10 years our ages will add up to 150
I will be {{{ 50 + 10 = 60 }}}
Mary will be {{{ 80 + 10 = 90 }}}