grade 9 math

Can someone please help me solve this equation. And please explain how to break this down.

4b-6+b-9= 0

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  1. 4b-6+b-9= 0

    Combine like terms.

    5b - 15 = 0

    Add 15 to both sides.

    5b = 15

    Divide both sides by 5 to find the value of b.

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    Ms. Sue

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