12x+3-4x+3=-18

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Solution for 12x+3-4x+3=-18 equation: 



12x+3-4x+3=-18

We move all terms to the left:

12x+3-4x+3-(-18)=0

We add all the numbers together, and all the variables

8x+24=0

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

8x=-24

x=-24/8

x=-3

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