7+(5+b)=

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Solution for 7+(5+b)= equation: 


Simplifying
7 + (5 + b) = 0

Remove parenthesis around (5 + b)
7 + 5 + b = 0

Combine like terms: 7 + 5 = 12
12 + b = 0

Solving
12 + b = 0

Solving for variable 'b'.

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

Add '-12' to each side of the equation.
12 + -12 + b = 0 + -12

Combine like terms: 12 + -12 = 0
0 + b = 0 + -12
b = 0 + -12

Combine like terms: 0 + -12 = -12
b = -12

Simplifying
b = -12

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