15+9b=42

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Solution for 15+9b=42 equation: 


Simplifying
15 + 9b = 42

Solving
15 + 9b = 42

Solving for variable 'b'.

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

Add '-15' to each side of the equation.
15 + -15 + 9b = 42 + -15

Combine like terms: 15 + -15 = 0
0 + 9b = 42 + -15
9b = 42 + -15

Combine like terms: 42 + -15 = 27
9b = 27

Divide each side by '9'.
b = 3

Simplifying
b = 3

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