Question 937270
{{{ 100*( .01w ) = w }}} liters of pure
orange juice in w% mixture
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{{{ x*( .01y ) = .01x*y }}} liter of pure
orange juice in y% mixture
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{{{ ( w + .01x*y ) / ( 100 + x ) = .01z }}}
{{{ w + .01x*y = .01z*( 100 + x ) }}}
{{{ w + .01x*y = z + x*z }}}
{{{ x*z - .01x*y = w - z }}}
{{{ x*( z - .01y ) = w - z }}}
{{{ x = ( w - z ) / ( z - .01y ) }}}