Question 498357
In words:
( cost for fruit ) / ( number of fruit ) = cost / single fruit
{ cost / single fruit ) x ( number bought ) = amount spent
{{{ 1/3 }}} = cost for a nectarine
{{{ 2/1 }}} = cost for a pomegranate
{{{ (1/3)*z + (2/1)*y }}} 
{{{ z/3 + 2y }}}  = amount spent