$\"\"$

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The word “less than” indicates subtraction and the symbol is ( $\"\"$ ).

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The word “plus” indicates addition and the symbol (+) \ \

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$\"\"$

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The equation is $\"\"$

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$\"\"$

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According to subtraction property of equality; if $\"\"$ , then $\"\"$ .

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$\"\"$ (Subtract $\"\"$ from each side).

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

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

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$\"\"$ (Subtract 6 from each side)

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$\"\"$ (Simplify)

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$\"\"$

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$\"\"$ (Multiply each side by 5)

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$\"\"$ (Cancel comon terms)

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

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$\"\"$ (Divide each side by 9)

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$\"\"$ (Divide each side by 9) \ \

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

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

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$\"\"$

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The value of $\"\"$ .