The description of the summation expression given as p + (-q) is the sum, p + (-q), is the number located a distance, |p|, from , q, in the negative direction.
<h3>How to describe the sum in terms of p and q?</h3>
The summation expression is given as:
p + (-q)
In the above summation expression, we assume that:
p ⇒ Positive number
- q ⇒ Negative number
Having said that:
The expression -q would go in the negative direction if plotted on a number line
This means that the description of the summation expression given as p + (-q) is the sum, p + (-q), is the number located a distance, |p|, from , q, in the negative direction.
Hence, the description of the summation expression given as p + (-q) is the sum, p + (-q), is the number located a distance, |p|, from , q, in the negative direction.
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and 
, so the sum is equal to