b+(-9)=3

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Solution for b+(-9)=3 equation: 


Simplifying
b + (-9) = 3
b + -9 = 3

Reorder the terms:
-9 + b = 3

Solving
-9 + b = 3

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 = 3 + 9

Combine like terms: -9 + 9 = 0
0 + b = 3 + 9
b = 3 + 9

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

Simplifying
b = 12

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