3x+15=12b-3b

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Solution for 3x+15=12b-3b equation: 


Simplifying
3x + 15 = 12b + -3b

Reorder the terms:
15 + 3x = 12b + -3b

Combine like terms: 12b + -3b = 9b
15 + 3x = 9b

Solving
15 + 3x = 9b

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + 3x = -15 + 9b

Combine like terms: 15 + -15 = 0
0 + 3x = -15 + 9b
3x = -15 + 9b

Divide each side by '3'.
x = -5 + 3b

Simplifying
x = -5 + 3b

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