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

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The equation is $\"\"$ .

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According to addition property of equality: if a = b, then a + c = b + c.

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$\"\"$ (Add 3|x| to each side)

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

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$\"\"$ (Subtract 10 each side)

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$\"\"$ (Commutative property: a + b = b + a) \ \

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

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

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

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$\"\"$ (Divide each side by 2)

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$\"\"$ (Cancel common terms)

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

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Write $\"\"$ as $\"\"$ . $\"\"$

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The value of $\"\"$ .