SOLUTION: I don't know if this is a proportion or not but I don't understand: 1/3+1/5=x/30 Thanks

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Question 662668: I don't know if this is a proportion or not but I don't understand:
1/3+1/5=x/30
Thanks
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
I don't know if this is a proportion or not but I don't understand:
1/3+1/5=x/30
when working with equations, to eliminate fractions, multiply each term by the LCD, which in this case=30
30*1/3+30*1/5=30*x/30
10+6=x
x=16