x-(-12)=-21*

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Solution for x-(-12)=-21* equation: 



x-(-12)=-21*

We move all terms to the left:

x-(-12)-(-21*)=0

We add all the numbers together, and all the variables

x-(-12)-0=0

We add all the numbers together, and all the variables

x+12=0

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

x=-12

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