-7b+9b=-20

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Solution for -7b+9b=-20 equation: 


Simplifying
-7b + 9b = -20

Combine like terms: -7b + 9b = 2b
2b = -20

Solving
2b = -20

Solving for variable 'b'.

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

Divide each side by '2'.
b = -10

Simplifying
b = -10

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