12b+9b+(-9b)+(-13b)=1

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Solution for 12b+9b+(-9b)+(-13b)=1 equation: 


Simplifying
12b + 9b + (-9b) + (-13b) = 1

Combine like terms: 12b + 9b = 21b
21b + (-9b) + (-13b) = 1

Combine like terms: 21b + (-9b) = 12b
12b + (-13b) = 1

Combine like terms: 12b + (-13b) = -1b
-1b = 1

Solving
-1b = 1

Solving for variable 'b'.

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

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

Simplifying
b = -1

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