Răspuns :

Andrei115id
x + x/2 + 2x = 140
2x +x + 4x = 140 *2
7x = 140*2
x = (140*2) / 7
x = 20*2
x = 40

Sandu3id
x+x:2+x:4=140
3x:2:4=140
3x:2=140x4
3x:2=560
3x=560x2
3x=1120
x=1120:3
x=373,(3)

ID Alte intrebari