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Answer:
[tex]8\frac{37}{56}[/tex]
Step-by-step explanation:
[tex]12\frac{2}{7} + 3\frac{5}{8} = \frac{86}{7} + \frac{29}{8} = \frac{688 - 203}{56} = \frac{485}{56} = 8\frac{37}{56}[/tex]