Question 1136953
Let {{{ x }}} = number of children
{{{ x / ( 36 - x ) = 5/4 }}}
{{{ 4x = 5*( 36 - x ) }}}
{{{ 4x = 180 - 5x }}}
{{{ 9x = 180 }}}
{{{ x = 20 }}}
There are 20 children
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check:
{{{ 36 - x = 16 }}}
{{{ 20/16 = 5/4 }}}
{{{ 5/4 = 5/4 }}}
OK