-31=1-4u

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Solution for -31=1-4u equation: 



-31=1-4u

We move all terms to the left:

-31-(1-4u)=0

We add all the numbers together, and all the variables

-(-4u+1)-31=0

We get rid of parentheses

4u-1-31=0

We add all the numbers together, and all the variables

4u-32=0

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

4u=32

u=32/4

u=8

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