2b+21=b-28

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Solution for 2b+21=b-28 equation:


Simplifying
2b + 21 = b + -28

Reorder the terms:
21 + 2b = b + -28

Reorder the terms:
21 + 2b = -28 + b

Solving
21 + 2b = -28 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
21 + 2b + -1b = -28 + b + -1b

Combine like terms: 2b + -1b = 1b
21 + 1b = -28 + b + -1b

Combine like terms: b + -1b = 0
21 + 1b = -28 + 0
21 + 1b = -28

Add '-21' to each side of the equation.
21 + -21 + 1b = -28 + -21

Combine like terms: 21 + -21 = 0
0 + 1b = -28 + -21
1b = -28 + -21

Combine like terms: -28 + -21 = -49
1b = -49

Divide each side by '1'.
b = -49

Simplifying
b = -49

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