-21*6=x

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Solution for -21*6=x equation: 



-21*6=x

We move all terms to the left:

-21*6-(x)=0

We add all the numbers together, and all the variables

-1x-126=0

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

-x=126

x=126/-1

x=-126

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