Răspuns :
6.
a+b=360
a=b×3
b×3+b=360
4b=360
b=360:4
b=90
a=90×3
a=270
deci se afla 270 kg in primul si 90 kg in al doilea
7.
3a+4b=34
a=6
b=4
verificare: 6×3+4×4=18+16=34
6.
a+b=360
a=b×3
b×3+b=360
4b=360
b=360:4
b=90
a=90×3
a=270
deci se afla 270 kg in primul si 90 kg in al doilea
7.
3a+4b=34
a=6
b=4
verificare: 6×3+4×4=18+16=34