2b=21+4b

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Solution for 2b=21+4b equation: 


Simplifying
2b = 21 + 4b

Solving
2b = 21 + 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
2b + -4b = 21 + 4b + -4b

Combine like terms: 2b + -4b = -2b
-2b = 21 + 4b + -4b

Combine like terms: 4b + -4b = 0
-2b = 21 + 0
-2b = 21

Divide each side by '-2'.
b = -10.5

Simplifying
b = -10.5

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