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

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The diagram is

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$\"\"$

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From the diagram, write an equation to find x.

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$\"\"$ $\"\"$ $\"\"$ (Group like terms)

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

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Apply subtraction property of equality: Subtract 9 from each side.

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$\"\"$

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

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

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

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Apply division property of equality: Divide each side by 4.

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$\"\"$

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

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The solution is $\"\"$ .