b+3-13=-21

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Solution for b+3-13=-21 equation: 


Simplifying
b + 3 + -13 = -21

Reorder the terms:
3 + -13 + b = -21

Combine like terms: 3 + -13 = -10
-10 + b = -21

Solving
-10 + b = -21

Solving for variable 'b'.

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

Add '10' to each side of the equation.
-10 + 10 + b = -21 + 10

Combine like terms: -10 + 10 = 0
0 + b = -21 + 10
b = -21 + 10

Combine like terms: -21 + 10 = -11
b = -11

Simplifying
b = -11

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