6u+9=18u-3u+31

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Solution for 6u+9=18u-3u+31 equation: 



6u+9=18u-3u+31

We move all terms to the left:

6u+9-(18u-3u+31)=0

We add all the numbers together, and all the variables

6u-(15u+31)+9=0

We get rid of parentheses

6u-15u-31+9=0

We add all the numbers together, and all the variables

-9u-22=0

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

-9u=22

u=22/-9

u=-2+4/9

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