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10^12=(10^x)/(10^9)
We move all terms to the left:
10^12-((10^x)/(10^9))=0
We add all the numbers together, and all the variables
-(10^x/10^9)+1000000000000=0
We get rid of parentheses
-10^x/10^9+1000000000000=0
We multiply all the terms by the denominator
-10^x+1000000000000*10^9=0
We add all the numbers together, and all the variables
-10^x+21+1.0E=0
We add all the numbers together, and all the variables
-10^x+23.7182818285=0
We move all terms containing x to the left, all other terms to the right
-10^x=-23.7182818285
x=-23.7182818285/1
x=-23.7182818285
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