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3.4k+(0.63-0.81k)/(0.9)=5.7
We simplify the equation to the form, which is simple to understand
3.4k+(0.63-0.81k)/(0.9)=5.7
Reorder the terms in parentheses
dividing of parentheses
3.4k+( + 0.7-0.9k)=5.7
Remove unnecessary parentheses
+3.4k + 0.7-0.9k=+5.7
We move all terms containing k to the left and all other terms to the right.
+3.4k-0.9k=+5.7-0.7
We simplify left and right side of the equation.
+2.5k=+5
We divide both sides of the equation by 2.5 to get k.
k=2
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