1) (34 + х) - 83 = 42,
34 + х = 42 + 83,
34 + х = 125,
х = 125 - 34,
х= 91;
2) 45 - (х - 16) = 28,
х - 16 = 45 - 28,
х - 16 = 17,
х = 17 + 16,
х = 33.
1) (34 + х) - 83 = 42,
34 + х = 42 + 83,
34 + х = 125,
х = 125 - 34,
х= 91;
2) 45 - (х - 16) = 28,
х - 16 = 45 - 28,
х - 16 = 17,
х = 17 + 16,
х = 33.