3x+12=(-18)

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



3x+12=(-18)

We move all terms to the left:

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

We add all the numbers together, and all the variables

3x+30=0

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

3x=-30

x=-30/3

x=-10

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