Question 1020170
Let {{{ x }}} = pounds of chicken 
salad he bought
{{{ 14 - x }}} = pounds of tuna 
salad he bought
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{{{ 9x + 6*( 14 - x ) = 111 }}}
{{{ 9x + 84 - 6x = 111 }}}
{{{ 3x = 27 }}}
{{{ x = 9 }}}
The answer is:
(D) 9 pounds
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check:
{{{ 9x + 6*( 14 - x ) = 111 }}}
{{{ 9*9 + 6*5 = 111 }}}
{{{ 81 + 30 = 111 }}}
{{{ 111 = 111 }}}
OK