2.1+u/7=-9.1

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Solution for 2.1+u/7=-9.1 equation: 



2.1+u/7=-9.1

We move all terms to the left:

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

We add all the numbers together, and all the variables

u/7+11.2=0

We multiply all the terms by the denominator


u+(11.2)*7=0

We add all the numbers together, and all the variables

u+78.4=0

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

u=-78.4

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