Answer:
9p + 6q
Explanation:
Rewrite each expression
Combine like terms
13p - 4p + 6q
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When we have like terms, we can only add the ones that have the same symbols as endings, such as variables, exponents, etc. Therefore :
Add "p" values together :
13p - 4p
9p.
Now rewrite the expression, we cannot combine like terms with "p" and "q" because they are not the same variable :
9p + 6q