Question 560328
Let {{{ a }}} = her age now
given:
{{{ a + 1 + a - 2 + 3*( a - 5 ) = 69 }}}
{{{ 2a - 1 + 3a - 15 = 69 }}}
{{{ 5a - 16 = 69 }}}
{{{ 5a = 69 + 16 }}}
{{{ 5a = 85 }}}
{{{ a = 17 }}}
She is 17
check:
{{{ 18 + 15 + 3*12 = 69 }}}
{{{ 33 + 36 = 69 }}}
{{{ 69 = 69 }}}
OK