-9+3b=12

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Solution for -9+3b=12 equation: 


Simplifying
-9 + 3b = 12

Solving
-9 + 3b = 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 + 3b = 12 + 9

Combine like terms: -9 + 9 = 0
0 + 3b = 12 + 9
3b = 12 + 9

Combine like terms: 12 + 9 = 21
3b = 21

Divide each side by '3'.
b = 7

Simplifying
b = 7

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