28=4u+7

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Solution for 28=4u+7 equation: 



28=4u+7

We move all terms to the left:

28-(4u+7)=0

We get rid of parentheses

-4u-7+28=0

We add all the numbers together, and all the variables

-4u+21=0

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

-4u=-21

u=-21/-4

u=5+1/4

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