Question 625740
Let {{{ x }}} = ml of bleach to be added
given:
{{{ x / ( x + 360 ) = .1 }}}
{{{ x = .1*( x + 360 ) }}}
{{{ x = .1x + 36 }}}
{{{ .9x = 36 }}}
{{{ x = 40  }}}
40 ml of bleach must be added