b+42=30

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Solution for b+42=30 equation: 


Simplifying
b + 42 = 30

Reorder the terms:
42 + b = 30

Solving
42 + b = 30

Solving for variable 'b'.

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

Add '-42' to each side of the equation.
42 + -42 + b = 30 + -42

Combine like terms: 42 + -42 = 0
0 + b = 30 + -42
b = 30 + -42

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

Simplifying
b = -12

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