х - 100 = 230
х = 230 + 100
х = 330
330 - 100 = 230
330 = 330
х-100=230
х=230+100
х=330
330-100=230
230=230
х - 100 = 230
х = 230 + 100
х = 330
330 - 100 = 230
330 = 330
х-100=230
х=230+100
х=330
330-100=230
230=230