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a*6.283185307=0.0005
We move all terms to the left:
a*6.283185307-(0.0005)=0
We add all the numbers together, and all the variables
a*6.283185307-0.0005=0
Wy multiply elements
6.283185307a-0.0005=0
We move all terms containing a to the left, all other terms to the right
6.283185307a=0.0005
a=0.0005/6.283185307
a=0.0005/6.283185307
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