👤

a-267=346 432+a=711 621-a=258

Răspuns :

a-267=346
a=346-267
a=79
verificare: 79+267=346

432+a=711
a=711-432
a=279
verificare: 432+279=711

621-a=258
a=621-258
a=363
verificare: 621-363=258