4-2u=20

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Solution for 4-2u=20 equation: 



4-2u=20

We move all terms to the left:

4-2u-(20)=0

We add all the numbers together, and all the variables

-2u-16=0

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

-2u=16

u=16/-2

u=-8

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