$\"Subtraction$ $\"\"$

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The equation is $\"\"$ .

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Apply subtraction property of equality: Subtract 23 from each side.

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$\"\"$

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$\"\"$ (Apply commutative property of addition: $\"\"$ )

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$\"\"$ (Apply additive inverse property: 23 $\"\"$ 23= 0)

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

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

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Check:

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

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$\"\"$

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

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The statement is true. $\"\"$

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To graph the solution on number line.

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First draw a number line.
Mark a dot at $\"\"$ on the number line.

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$\"number$ $\"\"$

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The value of $\"\"$ .