я не шарю
главный мозг или кто знает матем
​

Х+9=27        х-7=14         60-с=18        2х+1=77              4х-3=29
х=27-9         х=14+7        с=60-18        2х=77-1                4х=29+3  
х=18            х=21            с=42            2х=76                   4х=32 
18+9=27       21-7=14       60-42=18      х=76/2                  х=32/4   
                                                          х=38                     х=8        
                                                          2*38+1=77            4*8-3=29
                                 

Х+9=27        х-7=14         60-с=18        2х+1=77              4х-3=29
х=27-9         х=14+7        с=60-18        2х=77-1                4х=29+3  
х=18            х=21            с=42            2х=76                   4х=32 
18+9=27       21-7=14       60-42=18      х=76/2                  х=32/4   
                                                          х=38                     х=8        
                                                          2*38+1=77            4*8-3=29