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90k-60=0
We simplify the equation to the form, which is simple to understand
90k-60=0
We move all terms containing k to the left and all other terms to the right.
+90k=0+60
We simplify left and right side of the equation.
+90k=+60
We divide both sides of the equation by 90 to get k.
k=0.66666666666667
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