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200/12a=644
We move all terms to the left:
200/12a-(644)=0
Domain of the equation: 12a!=0We multiply all the terms by the denominator
a!=0/12
a!=0
a∈R
-644*12a+200=0
Wy multiply elements
-7728a+200=0
We move all terms containing a to the left, all other terms to the right
-7728a=-200
a=-200/-7728
a=25/966
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