4u=42+2u

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Solution for 4u=42+2u equation: 



4u=42+2u

We move all terms to the left:

4u-(42+2u)=0

We add all the numbers together, and all the variables

4u-(2u+42)=0

We get rid of parentheses

4u-2u-42=0

We add all the numbers together, and all the variables

2u-42=0

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

2u=42

u=42/2

u=21

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