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-(639)-6265+639k=0
We simplify the equation to the form, which is simple to understand
-(639)-6265+639k=0
Remove unnecessary parentheses
-639-6265+639k=0
We move all terms containing k to the left and all other terms to the right.
+639k=0+639+6265
We simplify left and right side of the equation.
+639k=+6904
We divide both sides of the equation by 639 to get k.
k=10.8043818466
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