Răspuns :
6p=4s
s=p+9RON
_____/__
2p+3s=500-x
_____//___
6p=4s
6p=4×(p+9)
6p=4p+36
=>2p=36
p=18 RON
s=p+9
s=18+9
s=27RON
2p+3s=500-x
2×18+3×27=500-x
36+81=500-x
117=500-x
x=383RON(rest primit)
6p=4s
s=p+9RON
_____/__
2p+3s=500-x
_____//___
6p=4s
6p=4×(p+9)
6p=4p+36
=>2p=36
p=18 RON
s=p+9
s=18+9
s=27RON
2p+3s=500-x
2×18+3×27=500-x
36+81=500-x
117=500-x
x=383RON(rest primit)