21+4b=5b

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Solution for 21+4b=5b equation:


Simplifying
21 + 4b = 5b

Solving
21 + 4b = 5b

Solving for variable 'b'.

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

Add '-5b' to each side of the equation.
21 + 4b + -5b = 5b + -5b

Combine like terms: 4b + -5b = -1b
21 + -1b = 5b + -5b

Combine like terms: 5b + -5b = 0
21 + -1b = 0

Add '-21' to each side of the equation.
21 + -21 + -1b = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -1b = 0 + -21
-1b = 0 + -21

Combine like terms: 0 + -21 = -21
-1b = -21

Divide each side by '-1'.
b = 21

Simplifying
b = 21

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