2.1+u/3=-5.4

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Solution for 2.1+u/3=-5.4 equation: 



2.1+u/3=-5.4

We move all terms to the left:

2.1+u/3-(-5.4)=0

We add all the numbers together, and all the variables

u/3+7.5=0

We multiply all the terms by the denominator


u+(7.5)*3=0

We add all the numbers together, and all the variables

u+22.5=0

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

u=-22.5

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