You can combine the same numbers with the same variables using the operation sign for each. For example, using your equation, you would combine the 3n and 4n which is 7n. So your equation would be
7n - 2
Answer:
-63
Step-by-step explanation:
Answer:3 to 2
Step-by-step explanation:
Answer:
<em>The last choice is correct</em>
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Step-by-step explanation:
<u>Least Common Multiple (LCM)</u>
To find the LCM we can follow this procedure:
List the prime factors of each monomial.
Multiply each factor the greatest number of times it occurs in either factor.
We have two monomials:


The prime factors of the first monomial are:

The prime factors of the second monomial are:

LCM = Multiply 
These are all the factors the greatest number of times they occur.
Operating:


The last choice is correct