$\"\"$

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$\"\"$ $\"\"$

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The given equation is $\"\"$ .

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Apply addition property of equality: Add 3 to each side.

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Add: $\"\"$ ) $\"\"$

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Apply addition property of equality: Add 6z to each side.

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$\"\"$

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Apply commutative property of addition: $\"\"$ .

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Add: $\"\"$ ) $\"\"$

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Apply division property of equality: Divide each side by 8.

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$\"\"$

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$\"\"$ (Cancel common terms)

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$\"\"$ (Divide: $\"\"$ ) $\"\"$

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Check:-

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To check the solution substitute $\"\"$ in equation $\"\"$ .

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ )

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

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Hence the solution is true. $\"\"$

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The solution is $\"\"$ .