12+3x=30-4x

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Solution for 12+3x=30-4x equation: 



12+3x=30-4x

We move all terms to the left:

12+3x-(30-4x)=0

We add all the numbers together, and all the variables

3x-(-4x+30)+12=0

We get rid of parentheses

3x+4x-30+12=0

We add all the numbers together, and all the variables

7x-18=0

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

7x=18

x=18/7

x=2+4/7

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