Question

Уровнения: 16+48:z =40
                   320:(52-х) =8
                   50 х у-72 =78                       

Answer 1

16+48:z=40
48:z=40-16
48:z=24
z=48:24
z=2
320:(52-х) =8,
52-х=320:8,
52-х=40,
х=52-40,
х=12
50*у-72=78
50*у=78+72
50*у=150
у=150:50
у=3