7+(9+k)=84

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Solution for 7+(9+k)=84 equation: 


Simplifying
7 + (9 + k) = 84

Remove parenthesis around (9 + k)
7 + 9 + k = 84

Combine like terms: 7 + 9 = 16
16 + k = 84

Solving
16 + k = 84

Solving for variable 'k'.

Move all terms containing k to the left, all other terms to the right.

Add '-16' to each side of the equation.
16 + -16 + k = 84 + -16

Combine like terms: 16 + -16 = 0
0 + k = 84 + -16
k = 84 + -16

Combine like terms: 84 + -16 = 68
k = 68

Simplifying
k = 68

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