9b=6b+21

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Solution for 9b=6b+21 equation: 


Simplifying
9b = 6b + 21

Reorder the terms:
9b = 21 + 6b

Solving
9b = 21 + 6b

Solving for variable 'b'.

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

Add '-6b' to each side of the equation.
9b + -6b = 21 + 6b + -6b

Combine like terms: 9b + -6b = 3b
3b = 21 + 6b + -6b

Combine like terms: 6b + -6b = 0
3b = 21 + 0
3b = 21

Divide each side by '3'.
b = 7

Simplifying
b = 7

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