6x+3=-3x-12

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Solution for 6x+3=-3x-12 equation: 



6x+3=-3x-12

We move all terms to the left:

6x+3-(-3x-12)=0

We get rid of parentheses

6x+3x+12+3=0

We add all the numbers together, and all the variables

9x+15=0

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

9x=-15

x=-15/9

x=-1+2/3

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