9+b=12

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Solution for 9+b=12 equation: 


Simplifying
9 + b = 12

Solving
9 + b = 12

Solving for variable 'b'.

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

Add '-9' to each side of the equation.
9 + -9 + b = 12 + -9

Combine like terms: 9 + -9 = 0
0 + b = 12 + -9
b = 12 + -9

Combine like terms: 12 + -9 = 3
b = 3

Simplifying
b = 3

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