4b+21=b

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Solution for 4b+21=b equation:


Simplifying
4b + 21 = b

Reorder the terms:
21 + 4b = b

Solving
21 + 4b = b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
21 + 4b + -1b = b + -1b

Combine like terms: 4b + -1b = 3b
21 + 3b = b + -1b

Combine like terms: b + -1b = 0
21 + 3b = 0

Add '-21' to each side of the equation.
21 + -21 + 3b = 0 + -21

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

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

Divide each side by '3'.
b = -7

Simplifying
b = -7

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