12=b+9

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Solution for 12=b+9 equation:


Simplifying
12 = b + 9

Reorder the terms:
12 = 9 + b

Solving
12 = 9 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
12 + -1b = 9 + b + -1b

Combine like terms: b + -1b = 0
12 + -1b = 9 + 0
12 + -1b = 9

Add '-12' to each side of the equation.
12 + -12 + -1b = 9 + -12

Combine like terms: 12 + -12 = 0
0 + -1b = 9 + -12
-1b = 9 + -12

Combine like terms: 9 + -12 = -3
-1b = -3

Divide each side by '-1'.
b = 3

Simplifying
b = 3

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