реши уравнения. 32:b=64:8; y:4=49:7; 380-b=330-175; t+32=185-143;

32:b=64:8
32:b=8
b=32:8
b=4

y:4=49:7
y:4=7
y=7•4
y=28

380-b=330-175
380-b=155
b=380-155
b=225

t+32=185-143
t+32=42
t=42-32
t=10