We can take prime numbers so they don't have a common factor other than 1.
3, and 5.
So we have to list the multiples to find the LCM
3: 3, 6, 9, 12,
15, 18
5: 5, 10,
15, 20, 25
15 is the LCM of 3 and 5
So, you can notice that if two numbers, lets call them a and b, have no common factor, then

is the LCM.
Hope that helped :)
Answer:

Explanation:
05/10
Simplifying
1/2
or 2^-1
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Answer:
18000
Step-by-step explanation:
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Answer:
x-7x+5
Step-by-step explanation:
4+x-7x+1
x-7x+5