8b=15b+21

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Solution for 8b=15b+21 equation: 


Simplifying
8b = 15b + 21

Reorder the terms:
8b = 21 + 15b

Solving
8b = 21 + 15b

Solving for variable 'b'.

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

Add '-15b' to each side of the equation.
8b + -15b = 21 + 15b + -15b

Combine like terms: 8b + -15b = -7b
-7b = 21 + 15b + -15b

Combine like terms: 15b + -15b = 0
-7b = 21 + 0
-7b = 21

Divide each side by '-7'.
b = -3

Simplifying
b = -3

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