Question 1044954
Let {{{ x }}} = the percent of fruit juice in brand A
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{{{ ( x*5 + .55*10 ) / ( 5 + 10 ) = .4 }}}
{{{ ( x*5 + 5.5 ) / 15 = .4 }}}
{{{ 5x + 5.5 = 6 }}}
{{{ 5x = .5 }}}
{{{ x = .1 }}}
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10% of brand A fruit juice is needed