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

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The equation is $\"\"$

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According to Addition Property of equality: If a = b then, $\"\"$ .

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$\"\"$ (Add p to each side)

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

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

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

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$\"\"$ (Divide each side by 10)

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

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Verify:

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

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$\"\"$

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$\"\"$ (Cancel common terms)

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$\"\"$ (Simplify) \ \

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

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Compare the values, the equation is true.

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$\"\"$

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The value of $\"\"$ .