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

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The equation is $\"\"$

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According to division property of equality:

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For any number a, b and c, If a = b then $\"\"$

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$\"\"$ (Divide each side by 7)

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$\"\"$ (Cancel common terms)

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

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The value of t = 6.