-21=-9b+6

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Solution for -21=-9b+6 equation:


Simplifying
-21 = -9b + 6

Reorder the terms:
-21 = 6 + -9b

Solving
-21 = 6 + -9b

Solving for variable 'b'.

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

Add '9b' to each side of the equation.
-21 + 9b = 6 + -9b + 9b

Combine like terms: -9b + 9b = 0
-21 + 9b = 6 + 0
-21 + 9b = 6

Add '21' to each side of the equation.
-21 + 21 + 9b = 6 + 21

Combine like terms: -21 + 21 = 0
0 + 9b = 6 + 21
9b = 6 + 21

Combine like terms: 6 + 21 = 27
9b = 27

Divide each side by '9'.
b = 3

Simplifying
b = 3

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