(a-4)=(a-a)

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Solution for (a-4)=(a-a) equation: 



(a-4)=(a-a)

We move all terms to the left:

(a-4)-((a-a))=0

We add all the numbers together, and all the variables

(a-4)-(0)=0

We add all the numbers together, and all the variables

(a-4)=0

We get rid of parentheses

a-4=0

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

a=4

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