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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