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(12+x)+(12+x)=x
We move all terms to the left:
(12+x)+(12+x)-(x)=0
We add all the numbers together, and all the variables
(x+12)+(x+12)-x=0
We add all the numbers together, and all the variables
-1x+(x+12)+(x+12)=0
We get rid of parentheses
-1x+x+x+12+12=0
We add all the numbers together, and all the variables
x+24=0
We move all terms containing x to the left, all other terms to the right
x=-24
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