b-1+4b=21

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Solution for b-1+4b=21 equation: 


Simplifying
b + -1 + 4b = 21

Reorder the terms:
-1 + b + 4b = 21

Combine like terms: b + 4b = 5b
-1 + 5b = 21

Solving
-1 + 5b = 21

Solving for variable 'b'.

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

Add '1' to each side of the equation.
-1 + 1 + 5b = 21 + 1

Combine like terms: -1 + 1 = 0
0 + 5b = 21 + 1
5b = 21 + 1

Combine like terms: 21 + 1 = 22
5b = 22

Divide each side by '5'.
b = 4.4

Simplifying
b = 4.4

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