-1=5-5b-21

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Solution for -1=5-5b-21 equation:


Simplifying
-1 = 5 + -5b + -21

Reorder the terms:
-1 = 5 + -21 + -5b

Combine like terms: 5 + -21 = -16
-1 = -16 + -5b

Solving
-1 = -16 + -5b

Solving for variable 'b'.

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

Add '5b' to each side of the equation.
-1 + 5b = -16 + -5b + 5b

Combine like terms: -5b + 5b = 0
-1 + 5b = -16 + 0
-1 + 5b = -16

Add '1' to each side of the equation.
-1 + 1 + 5b = -16 + 1

Combine like terms: -1 + 1 = 0
0 + 5b = -16 + 1
5b = -16 + 1

Combine like terms: -16 + 1 = -15
5b = -15

Divide each side by '5'.
b = -3

Simplifying
b = -3

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