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21(2-x)+12x=44
We move all terms to the left:
21(2-x)+12x-(44)=0
We add all the numbers together, and all the variables
21(-1x+2)+12x-44=0
We add all the numbers together, and all the variables
12x+21(-1x+2)-44=0
We multiply parentheses
12x-21x+42-44=0
We add all the numbers together, and all the variables
-9x-2=0
We move all terms containing x to the left, all other terms to the right
-9x=2
x=2/-9
x=-2/9
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