Răspuns :
Victor are 10 si mama lui are 40,
M=30+V
M=4V
=>4V=30+V=>3V=30=>V=10=>M=10+30=40
M=30+V
M=4V
=>4V=30+V=>3V=30=>V=10=>M=10+30=40
x-varsta mamei
y=varsta lui Victor
x=y+30
y=x:4
x=x:4+30
x-x:4=30
(4x-x):4=30
3x:4=30
x=(30*4):3
x=40
y=40:4
y=10
y=varsta lui Victor
x=y+30
y=x:4
x=x:4+30
x-x:4=30
(4x-x):4=30
3x:4=30
x=(30*4):3
x=40
y=40:4
y=10