18=-(k+3)

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Solution for 18=-(k+3) equation:


18=-(k+3)

We simplify the equation to the form, which is simple to understand 
18=-(k+3)

Remove unnecessary parentheses
18=-1k-3

We move all terms containing k to the left and all other terms to the right. 
+1k=-3-18

We simplify left and right side of the equation. 
+1k=-21

We divide both sides of the equation by 01 to get k. 
k=-21

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