3x+18=3-12

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Solution for 3x+18=3-12 equation: 



3x+18=3-12

We move all terms to the left:

3x+18-(3-12)=0

We add all the numbers together, and all the variables

3x+18-(-9)=0

We add all the numbers together, and all the variables

3x+27=0

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

3x=-27

x=-27/3

x=-9

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