b-9+7b=30

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Solution for b-9+7b=30 equation: 


Simplifying
b + -9 + 7b = 30

Reorder the terms:
-9 + b + 7b = 30

Combine like terms: b + 7b = 8b
-9 + 8b = 30

Solving
-9 + 8b = 30

Solving for variable 'b'.

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

Add '9' to each side of the equation.
-9 + 9 + 8b = 30 + 9

Combine like terms: -9 + 9 = 0
0 + 8b = 30 + 9
8b = 30 + 9

Combine like terms: 30 + 9 = 39
8b = 39

Divide each side by '8'.
b = 4.875

Simplifying
b = 4.875

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