7u+8=9u+2

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Solution for 7u+8=9u+2 equation: 



7u+8=9u+2

We move all terms to the left:

7u+8-(9u+2)=0

We get rid of parentheses

7u-9u-2+8=0

We add all the numbers together, and all the variables

-2u+6=0

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

-2u=-6

u=-6/-2

u=+3

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