8b-21=5b+6

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Solution for 8b-21=5b+6 equation:


Simplifying
8b + -21 = 5b + 6

Reorder the terms:
-21 + 8b = 5b + 6

Reorder the terms:
-21 + 8b = 6 + 5b

Solving
-21 + 8b = 6 + 5b

Solving for variable 'b'.

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

Add '-5b' to each side of the equation.
-21 + 8b + -5b = 6 + 5b + -5b

Combine like terms: 8b + -5b = 3b
-21 + 3b = 6 + 5b + -5b

Combine like terms: 5b + -5b = 0
-21 + 3b = 6 + 0
-21 + 3b = 6

Add '21' to each side of the equation.
-21 + 21 + 3b = 6 + 21

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

Combine like terms: 6 + 21 = 27
3b = 27

Divide each side by '3'.
b = 9

Simplifying
b = 9

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