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21(2-8)21x=44
We move all terms to the left:
21(2-8)21x-(44)=0
We add all the numbers together, and all the variables
21(-6)21x-44=0
We multiply parentheses
-2646x-44=0
We move all terms containing x to the left, all other terms to the right
-2646x=44
x=44/-2646
x=-22/1323
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