x + 16 = 74
x = 74 - 16
x = 58
x - 34 = 21
x = 21 + 34
x = 55
х+16=76
х=74-16
х=58
х-34=21
х=21+34
х-=55
x + 16 = 74
x = 74 - 16
x = 58
x - 34 = 21
x = 21 + 34
x = 55
х+16=76
х=74-16
х=58
х-34=21
х=21+34
х-=55