Răspunsuri

2014-06-27T11:35:21+03:00
X-varsta tatalui
y-varsta fiului

x-10=10(y-10)
x-10=10y-100
x=10y-100+10
x=10y-90

x+22=2(y+22)
x+22=2y+44
x=2y+44-22
x=2y+22

10y-90=2y+22
10y-2y=22+90
8y=112
y=14

x=2*14+22=28+22= 50
6 5 6