b-21=63

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Solution for b-21=63 equation: 


Simplifying
b + -21 = 63

Reorder the terms:
-21 + b = 63

Solving
-21 + b = 63

Solving for variable 'b'.

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

Add '21' to each side of the equation.
-21 + 21 + b = 63 + 21

Combine like terms: -21 + 21 = 0
0 + b = 63 + 21
b = 63 + 21

Combine like terms: 63 + 21 = 84
b = 84

Simplifying
b = 84

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