Răspuns :
a+2b=24
3a+2b+c=36
a=4c
---------------------------
3*4c + 24-4c / 2 +c = 36
13c*2 + 24-4c =2*36
22c=72-24
22c=48
c= 48/22 = 24/11
a=4c= 96/11
b=24-a / 2 = calculezi tu
3a+2b+c=36
a=4c
---------------------------
3*4c + 24-4c / 2 +c = 36
13c*2 + 24-4c =2*36
22c=72-24
22c=48
c= 48/22 = 24/11
a=4c= 96/11
b=24-a / 2 = calculezi tu
x,y si z cele 3 Nr
x+2y=24
3x+2y+z=36
2x+x+2y+z=36
2x+z=36-24
2x+z=12
x=4z
2×4z+z=12
9z=12
z=12/9
z=4/3
x=4×4/3
x=16/3
16/3+2y=24
16+6y=72
6y=72-16
6y=56
y=28/3
proba:
3×16/3+2×28/3+4/3=(48+56+4)/3=108/3=36
x+2y=24
3x+2y+z=36
2x+x+2y+z=36
2x+z=36-24
2x+z=12
x=4z
2×4z+z=12
9z=12
z=12/9
z=4/3
x=4×4/3
x=16/3
16/3+2y=24
16+6y=72
6y=72-16
6y=56
y=28/3
proba:
3×16/3+2×28/3+4/3=(48+56+4)/3=108/3=36