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Can someone explain this in 12 yr old form on how to do this ? 3w+3+2w=18 PS you gotta find out what w means ;)

Mathematics
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3w and 2w are like terms. you can combine them, which will equal 5w. now you have 5w+3=18 remember you always want to get the variable alone, so you want to subtract 3 from both sides. 5w=15 (i subtracted 3 from 18) now, when 5 and w are together like that, it means multiplying, but we want to do the opposite of multiplying, which is dividing. we need to cancel out 5 to get the variable by itself so 5 divided by 15 equals 3 your answer is w=3
Thank you ! I cant really comprehend in class vey well :) <3
no problem

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Other answers:

  • phi
Here's a good video, it and the 2 following http://www.khanacademy.org/video/simple-equations?playlist=Algebra

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