8.5u+4.5=12.1u-2.7

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Solution for 8.5u+4.5=12.1u-2.7 equation: 



8.5u+4.5=12.1u-2.7

We move all terms to the left:

8.5u+4.5-(12.1u-2.7)=0

We get rid of parentheses

8.5u-12.1u+2.7+4.5=0

We add all the numbers together, and all the variables

-3.6u+7.2=0

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

-3.6u=-7.2

u=-7.2/-3.6

u=+2

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