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55k-51k-3k=66
We simplify the equation to the form, which is simple to understand
55k-51k-3k=66
We move all terms containing k to the left and all other terms to the right.
+55k-51k-3k=+66
We simplify left and right side of the equation.
+1k=+66
We divide both sides of the equation by 1 to get k.
k=66
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