Question

Va rog! Dau coroana... Ex: 4,5,6

Answer 1

4. a+b=6,75
a=2b
2b+b=6,75
3b=6,75
b=6,75/3
b=2,25
a=2b=2,25x2=4,50
5.(a+b+c):3=2.5
a=b+0,7
b=2c
a=2c+0,7
(2c+0,7+2c+c):3=2.5
5c+0.7=2.5x3
5c+0,7=7.5
5c=7.5-0,7
5c=6.8
c=6,8:5
c=1.36
a=2c+0,7=2,72+0,7=2,79
b=2c=2,72
6.p=Pret a 3.5 kg portocale
m=Pret a 2.4 kg mere
s=Pret a 1.8 kg struguri
t=Pret total
p=3.5x4=14 lei
m=2.4x3.5=8,4 lei
s=1.8x6=10,8
t=p+m+s=14+8.4+10.8=14+19,2=33,2 lei
r=rest
100-t=r
100-33,2=r
r=76,8 lei