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2.2k+5+7.9k+8=0
We simplify the equation to the form, which is simple to understand
2.2k+5+7.9k+8=0
We move all terms containing k to the left and all other terms to the right.
+2.2k+7.9k=0-5-8
We simplify left and right side of the equation.
+10.1k=-13
We divide both sides of the equation by 10.1 to get k.
k=-1.28712871287
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