3u+20=6u-7

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Solution for 3u+20=6u-7 equation: 



3u+20=6u-7

We move all terms to the left:

3u+20-(6u-7)=0

We get rid of parentheses

3u-6u+7+20=0

We add all the numbers together, and all the variables

-3u+27=0

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

-3u=-27

u=-27/-3

u=+9

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