Question

Please ex 6 7 10
Dau 30 puncte
Please!!!!!!!!!!!!!

Answer 1

6.
a+b+c=370
a=b:3 =>b=3a
c=2b=6a
a+3a+6a=370
10a=370 =>a=37 =>b=111 =>c=222

7.
a+b+c=126
b=a+7
c=b+10=a+7+10=a+17
a+a+7+a+17=126
3a+24=126
3a=102 =>a=34 =>b=41 =>c=51

10.
3s+4p=440 =>3s=440-4p =>s=(440-4p)/3
5s+2p=500
5 • (440-4p)/3 + 2p = 500
2200-20p+6p=1500
14p=700 =>p=50 lei =>s=80 lei
50+2•80=210 lei