$\"\"$

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The equations are $\"\"$ .

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Solve the equation 1: $\"\"$ for a.

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Multiply each side by b.

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$\"\"$

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$\"\"$ . $\"\"$

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Solve the equation 2: $\"\"$ for a.

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Add 5 to each side.

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$\"\"$

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$\"\"$

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Divide each side by c.

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$\"\"$

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$\"\"$ . $\"\"$

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The two values of $\"\"$ and $\"\"$ .

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The two values are same, therefore $\"\"$ .

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Multiply each side by $\"\"$ .

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$\"\"$

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Cancel common terms.

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$\"\"$ . $\"\"$

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The option B is correct answer.