3u-13=20

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Solution for 3u-13=20 equation: 



3u-13=20

We move all terms to the left:

3u-13-(20)=0

We add all the numbers together, and all the variables

3u-33=0

We move all terms containing u to the left, all other terms to the right

3u=33

u=33/3

u=11

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