3x+2.5=12x-2.5x+9

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Solution for 3x+2.5=12x-2.5x+9 equation: 



3x+2.5=12x-2.5x+9

We move all terms to the left:

3x+2.5-(12x-2.5x+9)=0

We add all the numbers together, and all the variables

3x-(9.5x+9)+2.5=0

We get rid of parentheses

3x-9.5x-9+2.5=0

We add all the numbers together, and all the variables

-6.5x-6.5=0

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

-6.5x=6.5

x=6.5/-6.5

x=-1

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