15b-12b=42

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Solution for 15b-12b=42 equation: 


Simplifying
15b + -12b = 42

Combine like terms: 15b + -12b = 3b
3b = 42

Solving
3b = 42

Solving for variable 'b'.

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

Divide each side by '3'.
b = 14

Simplifying
b = 14

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