B+3+8b=21

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Solution for B+3+8b=21 equation: 


Simplifying
B + 3 + 8b = 21

Reorder the terms:
3 + B + 8b = 21

Solving
3 + B + 8b = 21

Solving for variable 'B'.

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

Add '-3' to each side of the equation.
3 + B + -3 + 8b = 21 + -3

Reorder the terms:
3 + -3 + B + 8b = 21 + -3

Combine like terms: 3 + -3 = 0
0 + B + 8b = 21 + -3
B + 8b = 21 + -3

Combine like terms: 21 + -3 = 18
B + 8b = 18

Add '-8b' to each side of the equation.
B + 8b + -8b = 18 + -8b

Combine like terms: 8b + -8b = 0
B + 0 = 18 + -8b
B = 18 + -8b

Simplifying
B = 18 + -8b

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