13u+3u-8u=15

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Solution for 13u+3u-8u=15 equation: 



13u+3u-8u=15

We move all terms to the left:

13u+3u-8u-(15)=0

We add all the numbers together, and all the variables

8u-15=0

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

8u=15

u=15/8

u=1+7/8

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