Question 936270
If he bought 70 hotdogs,
that is: {{{ 70*.25 = 17.5 }}}
and {{{ 8*.5 = 4 }}}
{{{ 17.5 + 4 = 21.5 }}}  not enough
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If he bought 68 hotdogs:
{{{ 68*.25 = 17 }}}
and {{{ 10*.5 = 5 }}}
{{{ 17 + 5 = 22 }}} not enough
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If he bought 66 hotdogs
{{{ 66*.25 = 16.5 }}}
and {{{ 12*.5 = 6 }}}
{{{ 16.5 + 6 = 22.5 }}}
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If he bought 65 hotdogs:
{{{ 65*.25 = 16.25 }}}
and {{{ 13*.5 = 6.5 }}}
{{{ 16.25 + 6.5 = 22.75 }}} almost
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If he bought 64 hotdogs:
{{{ 64*.25 = 16 }}}
and {{{ 14*.5 = 7 }}}
{{{ 16 + 7 = 23 }}}
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He can buy 64 hotdogs and 14 hamburgers