B-21=-4

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Solution for B-21=-4 equation: 


Simplifying
B + -21 = -4

Reorder the terms:
-21 + B = -4

Solving
-21 + B = -4

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 = -4 + 21

Combine like terms: -21 + 21 = 0
0 + B = -4 + 21
B = -4 + 21

Combine like terms: -4 + 21 = 17
B = 17

Simplifying
B = 17

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