b+21=12b-45

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Solution for b+21=12b-45 equation:


Simplifying
b + 21 = 12b + -45

Reorder the terms:
21 + b = 12b + -45

Reorder the terms:
21 + b = -45 + 12b

Solving
21 + b = -45 + 12b

Solving for variable 'b'.

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

Add '-12b' to each side of the equation.
21 + b + -12b = -45 + 12b + -12b

Combine like terms: b + -12b = -11b
21 + -11b = -45 + 12b + -12b

Combine like terms: 12b + -12b = 0
21 + -11b = -45 + 0
21 + -11b = -45

Add '-21' to each side of the equation.
21 + -21 + -11b = -45 + -21

Combine like terms: 21 + -21 = 0
0 + -11b = -45 + -21
-11b = -45 + -21

Combine like terms: -45 + -21 = -66
-11b = -66

Divide each side by '-11'.
b = 6

Simplifying
b = 6

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