3b+12=42

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Solution for 3b+12=42 equation: 


Simplifying
3b + 12 = 42

Reorder the terms:
12 + 3b = 42

Solving
12 + 3b = 42

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 = 42 + -12

Combine like terms: 12 + -12 = 0
0 + 3b = 42 + -12
3b = 42 + -12

Combine like terms: 42 + -12 = 30
3b = 30

Divide each side by '3'.
b = 10

Simplifying
b = 10

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