There is no answer to your question.....
To solve this, lets first find all the pairs of numbers that, when multiplied equal 80.
(1,80)& (-1,-80)& (2,40)& (-2,-40)& (5,16)& (-5,-16)& (8,10)& (-8,10)
all of these pairs, when multiplied equal 80. None of them add up to 14. There is no answer to your question.
