$\"\"$

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According to Means-extremes Property of proportion:

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If $\"\"$ ,then $\"\"$

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$\"\"$ (Cross products)

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$\"\"$

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

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$\"\"$ (Apply Distributive property: $\"\"$ )

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$\"\"$ (Simplify)

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$\"\"$

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According to Subtraction property of equality; If $\"\"$ then, $\"\"$

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$\"\"$ (Subtract 4 from each side)

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

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$\"\"$ (Simplify: $\"\"$ )

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$\"\"$ (Divide each side by 4)

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

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The value of x is 5.

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