Răspuns :
x+y+z=126
12+11+7=30
126-30=96
96:3=32
x=32+12
x=44
y=32+11
y=43
z=32+7
z=39
Verificare
39+43+44=126
12+11+7=30
126-30=96
96:3=32
x=32+12
x=44
y=32+11
y=43
z=32+7
z=39
Verificare
39+43+44=126
12+11+7=30
126-30=94
96:3=32 l
1) 32+12=44 l
2) 32+11=43 l
3) 32+7=39 l
V:44+43+39==126 l
126-30=94
96:3=32 l
1) 32+12=44 l
2) 32+11=43 l
3) 32+7=39 l
V:44+43+39==126 l