3=2u+7

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Solution for 3=2u+7 equation: 



3=2u+7

We move all terms to the left:

3-(2u+7)=0

We get rid of parentheses

-2u-7+3=0

We add all the numbers together, and all the variables

-2u-4=0

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

-2u=4

u=4/-2

u=-2

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