9=b(-1)

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Solution for 9=b(-1) equation:


Simplifying
9 = b(-1)

Reorder the terms for easier multiplication:
9 = -1b

Solving
9 = -1b

Solving for variable 'b'.

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

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

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

Add '-9' to each side of the equation.
9 + -9 + b = 0 + -9

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

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

Simplifying
b = -9

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