12+5B=2B-9

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Solution for 12+5B=2B-9 equation:


Simplifying
12 + 5B = 2B + -9

Reorder the terms:
12 + 5B = -9 + 2B

Solving
12 + 5B = -9 + 2B

Solving for variable 'B'.

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

Add '-2B' to each side of the equation.
12 + 5B + -2B = -9 + 2B + -2B

Combine like terms: 5B + -2B = 3B
12 + 3B = -9 + 2B + -2B

Combine like terms: 2B + -2B = 0
12 + 3B = -9 + 0
12 + 3B = -9

Add '-12' to each side of the equation.
12 + -12 + 3B = -9 + -12

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

Combine like terms: -9 + -12 = -21
3B = -21

Divide each side by '3'.
B = -7

Simplifying
B = -7

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