4b+b+9=84

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Solution for 4b+b+9=84 equation: 


Simplifying
4b + b + 9 = 84

Reorder the terms:
9 + 4b + b = 84

Combine like terms: 4b + b = 5b
9 + 5b = 84

Solving
9 + 5b = 84

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 + 5b = 84 + -9

Combine like terms: 9 + -9 = 0
0 + 5b = 84 + -9
5b = 84 + -9

Combine like terms: 84 + -9 = 75
5b = 75

Divide each side by '5'.
b = 15

Simplifying
b = 15

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