Ирешите : (х-12)*8=58, 24*(z+9)=288, (y+25): 8=16

(х-12)*8=58         24(z+9)=288        (y+25):8=16
х-12=58 : 8         z+9=288:24         y+25=16*8
х-12=7,25           z+9=12               y+25=128
х=7,25+12          z=12-9                y=128-25
х=19,25              z=3                    y=103