42=32+u

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Solution for 42=32+u equation: 



42=32+u

We move all terms to the left:

42-(32+u)=0

We add all the numbers together, and all the variables

-(u+32)+42=0

We get rid of parentheses

-u-32+42=0

We add all the numbers together, and all the variables

-1u+10=0

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

-u=-10

u=-10/-1

u=+10

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