6x=-9-12

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Solution for 6x=-9-12 equation: 



6x=-9-12

We move all terms to the left:

6x-(-9-12)=0

We add all the numbers together, and all the variables

6x-(-21)=0

We add all the numbers together, and all the variables

6x+21=0

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

6x=-21

x=-21/6

x=-3+1/2

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