Răspuns :
a+b=S
a-b=D
S. ₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋
D. ₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋!₋₋36₋₋₋₋₋₋₋
S=D+36
S=4D
4D=D+36
3D=36
D=12
S=12+36
S=48
a+b=48
a-b=12
2a=60
a=30
b=30-12
b=18
a-b=D
S. ₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋
D. ₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋!₋₋36₋₋₋₋₋₋₋
S=D+36
S=4D
4D=D+36
3D=36
D=12
S=12+36
S=48
a+b=48
a-b=12
2a=60
a=30
b=30-12
b=18