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0.21x+x=1000
We move all terms to the left:
0.21x+x-(1000)=0
We add all the numbers together, and all the variables
1.21x-1000=0
We move all terms containing x to the left, all other terms to the right
1.21x=1000
x=1000/1.21
x=826+0.54/1.21
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