Question 534322
Let {{{a}}} = her age now
{{{ a + 7 }}} = her age in {{{ 7 }}} years
{{{ a - 8 }}} = her age {{{8}}} years ago
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given:
{{{ a + 7 = 2*( a - 8 ) }}}
{{{ a + 7 = 2a - 16 }}}
{{{ a = 23 }}}
She is 23 now