?Which of the following does not describe a viable method to find the sum 3 + (-4)?
A.
?Let p = positive unit, and n = negative unit. 
+ 
--> four p's and four n's eliminate each other. Answer = n.
B.
?Let p = positive unit, and n = negative unit. 
+ 
--> Answer is 3p + 4n.
C.
?On a number line, start at +3 and move left 4 units. You arrive at -1.
D.
?On a number line, combining +3 - 4 will result in the same answer as 3 + (-4).
E.
?On a number line, combing -4 + 3 will result in the same answer of 3 + (-4).
Answer: B
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