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217-178a+1789=0
We simplify the equation to the form, which is simple to understand
217-178a+1789=0
We move all terms containing a to the left and all other terms to the right.
-178a=0-217-1789
We simplify left and right side of the equation.
-178a=-2006
We divide both sides of the equation by -178 to get a.
a=11.269662921348
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