3x=99-3x

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Solution for 3x=99-3x equation: 



3x=99-3x

We move all terms to the left:

3x-(99-3x)=0

We add all the numbers together, and all the variables

3x-(-3x+99)=0

We get rid of parentheses

3x+3x-99=0

We add all the numbers together, and all the variables

6x-99=0

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

6x=99

x=99/6

x=16+1/2

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