Question 780196
Let {{{ x }}} = number of pounds of raisins in 
a 10-pound mixture of walnuts and raisins
{{{ 10 - x }}} = pounds of walnuts in the mixture
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{{{ 4.6x }}} = value of raisins in the mixture
{{{ 7.4*( 10 - x ) }}} = value of walnuts in mixture
{{{ 7.4*( 10 - x ) + 4.6x }}} = value of walnuts + raisins