13=1-5b-8

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Solution for 13=1-5b-8 equation:


Simplifying
13 = 1 + -5b + -8

Reorder the terms:
13 = 1 + -8 + -5b

Combine like terms: 1 + -8 = -7
13 = -7 + -5b

Solving
13 = -7 + -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.
13 + 5b = -7 + -5b + 5b

Combine like terms: -5b + 5b = 0
13 + 5b = -7 + 0
13 + 5b = -7

Add '-13' to each side of the equation.
13 + -13 + 5b = -7 + -13

Combine like terms: 13 + -13 = 0
0 + 5b = -7 + -13
5b = -7 + -13

Combine like terms: -7 + -13 = -20
5b = -20

Divide each side by '5'.
b = -4

Simplifying
b = -4

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