3=u-7.5

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Solution for 3=u-7.5 equation: 



3=u-7.5

We move all terms to the left:

3-(u-7.5)=0

We get rid of parentheses

-u+7.5+3=0

We add all the numbers together, and all the variables

-1u+10.5=0

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

-u=-10.5

u=-10.5/-1

u=10+0.5/1

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