3=2.75x+12

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Solution for 3=2.75x+12 equation: 



3=2.75x+12

We move all terms to the left:

3-(2.75x+12)=0

We get rid of parentheses

-2.75x-12+3=0

We add all the numbers together, and all the variables

-2.75x-9=0

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

-2.75x=9

x=9/-2.75

x=-3+0.75/2.75

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