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0.66x-21=0.75x
We move all terms to the left:
0.66x-21-(0.75x)=0
We add all the numbers together, and all the variables
0.66x-(+0.75x)-21=0
We get rid of parentheses
0.66x-0.75x-21=0
We add all the numbers together, and all the variables
-0.09x-21=0
We move all terms containing x to the left, all other terms to the right
-0.09x=21
x=21/-0.09
x=-233+0.030000000000001/0.09
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