Question 1059600
So far, she has {{{ 40 + 2*8 = 40 + 16
{{{ 40 + 16 = 56 }}}
{{{ 56/9 = 6 + 2/9 }}}
You need {{{ 6 + 9/9 = 7 }}} for stacks of 9 cards each
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{{{ 9/9 - 2/9 = 7/9 }}} so you need {{{ 7 }}}
more cards
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check:
{{{ 56 + 7 = 63 }}}
{{{ 63/9 = 7 }}} stacks of 9 each