$\"\"$

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The equation is $\"\"$ .

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Apply subtraction property of equality: Subtract 5z from each side.

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$\"\"$

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$\"\"$

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$\"\"$

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Apply addition property of equality: Add 4 to each side.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Divide each side by 2.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The solution is $\"\"$ .