\"\"\"\"

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Given equation is \"\".

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According to Subtraction property of equality: if \"\", then \"\".

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\"\"             (Subtract b from each side)

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\"\"                         (Additive inverse property: \"\")

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\"\"         (Subtract 2z from each side)

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\"\"         (Commutative property of addition: \"\") 

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\"\"                         (Additive inverse property: \"\")

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\"\"                                 (Subtract: \"\")

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\"\"                            (Divide each side by 2)

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\"\"                                 (Cancel common terms)\"\"

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The solution is \"\".