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Using the fact that the opposite sides are congruent, solve for x.

Using the fact that the opposite sides are congruent, solve for x.-example-1
User SoField
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\begin{gathered} The\text{ congruent means the same in the size, so} \\ 9x-13=59 \\ 9x=59+13 \\ 9x=72 \\ x=8 \end{gathered}

User ChenL
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