-3b-12=15

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Solution for -3b-12=15 equation: 


Simplifying
-3b + -12 = 15

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

Solving
-12 + -3b = 15

Solving for variable 'b'.

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

Add '12' to each side of the equation.
-12 + 12 + -3b = 15 + 12

Combine like terms: -12 + 12 = 0
0 + -3b = 15 + 12
-3b = 15 + 12

Combine like terms: 15 + 12 = 27
-3b = 27

Divide each side by '-3'.
b = -9

Simplifying
b = -9

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