-8.4=9.1+u/7

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Solution for -8.4=9.1+u/7 equation: 



-8.4=9.1+u/7

We move all terms to the left:

-8.4-(9.1+u/7)=0

We add all the numbers together, and all the variables

-(u/7+9.1)-8.4=0

We get rid of parentheses

-u/7-9.1-8.4=0

We multiply all the terms by the denominator


-u-(9.1)*7-(8.4)*7=0

We add all the numbers together, and all the variables

-1u-122.5=0

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

-u=122.5

u=122.5/-1

u=-122+0.5/1

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