u-42=2u-91

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Solution for u-42=2u-91 equation: 



u-42=2u-91

We move all terms to the left:

u-42-(2u-91)=0

We get rid of parentheses

u-2u+91-42=0

We add all the numbers together, and all the variables

-1u+49=0

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

-u=-49

u=-49/-1

u=+49

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