4u+12=20

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Solution for 4u+12=20 equation: 



4u+12=20

We move all terms to the left:

4u+12-(20)=0

We add all the numbers together, and all the variables

4u-8=0

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

4u=8

u=8/4

u=2

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