7[9+k]=84

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Solution for 7[9+k]=84 equation:


7[9+k]=84

We simplify the equation to the form, which is simple to understand 
7(9+k)=84

Reorder the terms in parentheses
+(+63+7k)=84

Remove unnecessary parentheses
+63+7k=+84

We move all terms containing k to the left and all other terms to the right. 
+7k=+84-63

We simplify left and right side of the equation. 
+7k=+21

We divide both sides of the equation by 7 to get k. 
k=3

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