9b-8+4b=30

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Solution for 9b-8+4b=30 equation:


Simplifying
9b + -8 + 4b = 30

Reorder the terms:
-8 + 9b + 4b = 30

Combine like terms: 9b + 4b = 13b
-8 + 13b = 30

Solving
-8 + 13b = 30

Solving for variable 'b'.

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

Add '8' to each side of the equation.
-8 + 8 + 13b = 30 + 8

Combine like terms: -8 + 8 = 0
0 + 13b = 30 + 8
13b = 30 + 8

Combine like terms: 30 + 8 = 38
13b = 38

Divide each side by '13'.
b = 2.923076923

Simplifying
b = 2.923076923

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