Question

Найдите x, y, z.....

Answer 1

х=80
у=40
z=60
y+z=100
x+z=140
x+y=120
y=100-z
x=140-z
100-z+140-z=120
-2z=-120
z=60
x+60=140
x=80
y+60=100
y=40