12x-15=30-3x

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Solution for 12x-15=30-3x equation: 



12x-15=30-3x

We move all terms to the left:

12x-15-(30-3x)=0

We add all the numbers together, and all the variables

12x-(-3x+30)-15=0

We get rid of parentheses

12x+3x-30-15=0

We add all the numbers together, and all the variables

15x-45=0

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

15x=45

x=45/15

x=3

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