3b+3b-6=12

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Solution for 3b+3b-6=12 equation: 


Simplifying
3b + 3b + -6 = 12

Reorder the terms:
-6 + 3b + 3b = 12

Combine like terms: 3b + 3b = 6b
-6 + 6b = 12

Solving
-6 + 6b = 12

Solving for variable 'b'.

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

Add '6' to each side of the equation.
-6 + 6 + 6b = 12 + 6

Combine like terms: -6 + 6 = 0
0 + 6b = 12 + 6
6b = 12 + 6

Combine like terms: 12 + 6 = 18
6b = 18

Divide each side by '6'.
b = 3

Simplifying
b = 3

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