4b-(-9b)=

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Solution for 4b-(-9b)= equation: 


Simplifying
4b + -1(-9b) = 0

Remove parenthesis around (-9b)
4b + -1 * -9b = 0

Multiply -1 * -9
4b + 9b = 0

Combine like terms: 4b + 9b = 13b
13b = 0

Solving
13b = 0

Solving for variable 'b'.

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

Divide each side by '13'.
b = 0

Simplifying
b = 0

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