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2.5k+2.8=30.80
We simplify the equation to the form, which is simple to understand
2.5k+2.8=30.80
We move all terms containing k to the left and all other terms to the right.
+2.5k=+30.8-2.8
We simplify left and right side of the equation.
+2.5k=+28
We divide both sides of the equation by 2.5 to get k.
k=11.2
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