12x+3=-21

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Solution for 12x+3=-21 equation: 



12x+3=-21

We move all terms to the left:

12x+3-(-21)=0

We add all the numbers together, and all the variables

12x+24=0

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

12x=-24

x=-24/12

x=-2

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