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The minimum timings of eclipsing binaries V418 Aql, SU Boo, RV CVn, CR Cas,GV Cyg, V432 Per, and BD+42 2782 were collected and analyzed. Their long-termbehavior was studied via period analysis, revealing a periodic term in eclipsetimes. We derived 576 new times of minimum. Hence, to describe the periodicvariation, a thirdbody hypothesis was proposed and the resulting orbitalperiods are as follows: 70, 7.4, 53, 37, 27, 53, and 18 yr, respectively. Forthe system V432 Per an additional 9.5 yr variation was also found. Thepredicted minimum masses of these distant bodies were calculated and theirdetectability discussed. The light curves of SU Boo and RV CVn were analyzedusing the PHOEBE program, resulting in physical parameters of the components.New variable stars in the field of V418 Aql were discovered.

The period analysis of V418 Aql, SU Boo, RV CVn, CR Cas, GV Cyg, V432 Per, and BD+42 2782