-12b-3=21

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Solution for -12b-3=21 equation: 


Simplifying
-12b + -3 = 21

Reorder the terms:
-3 + -12b = 21

Solving
-3 + -12b = 21

Solving for variable 'b'.

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

Add '3' to each side of the equation.
-3 + 3 + -12b = 21 + 3

Combine like terms: -3 + 3 = 0
0 + -12b = 21 + 3
-12b = 21 + 3

Combine like terms: 21 + 3 = 24
-12b = 24

Divide each side by '-12'.
b = -2

Simplifying
b = -2

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