21x=6-12

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Solution for 21x=6-12 equation: 



21x=6-12

We move all terms to the left:

21x-(6-12)=0

We add all the numbers together, and all the variables

21x-(-6)=0

We add all the numbers together, and all the variables

21x+6=0

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

21x=-6

x=-6/21

x=-2/7

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