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15(k+3)-k=20
We simplify the equation to the form, which is simple to understand
15(k+3)-k=20
Reorder the terms in parentheses
+(+15k+45)-k=20
Remove unnecessary parentheses
+15k+45-k=+20
We move all terms containing k to the left and all other terms to the right.
+15k-1k=+20-45
We simplify left and right side of the equation.
+14k=-25
We divide both sides of the equation by 14 to get k.
k=-1.78571428571
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