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8*10^-9/207.2=x
We move all terms to the left:
8*10^-9/207.2-(x)=0
We add all the numbers together, and all the variables
-1x-9/207.2=0
We multiply all the terms by the denominator
-1x*207.2-9=0
Wy multiply elements
-207.2x-9=0
We move all terms containing x to the left, all other terms to the right
-207.2x=9
x=9/-207.2
x=-1/23.022222222222
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