30=b-12

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Solution for 30=b-12 equation:


Simplifying
30 = b + -12

Reorder the terms:
30 = -12 + b

Solving
30 = -12 + 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.
30 + -1b = -12 + b + -1b

Combine like terms: b + -1b = 0
30 + -1b = -12 + 0
30 + -1b = -12

Add '-30' to each side of the equation.
30 + -30 + -1b = -12 + -30

Combine like terms: 30 + -30 = 0
0 + -1b = -12 + -30
-1b = -12 + -30

Combine like terms: -12 + -30 = -42
-1b = -42

Divide each side by '-1'.
b = 42

Simplifying
b = 42

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