(a+b)/2=1,52 a+b=3,04
(a+c)/2=10,7 a+c=21,4
(b+c)/2=3,8 b+c=7,6
(a+b)/2+(a+c)/2+(b+c)/2=1,52+10,7+3,8
a+b+c=16,02
a=16,02-7,6=8,42
b=16,02-21,4=-5,38
c=16,02-3,04=12,98
2.(a+b+c)/3=46 2/3 =140/3
a+b+c=140
b=0,5a
c=0,5b =0,25a
a+0,5a+0,25a=140
1,75a=140
a=80
b=80×0,5=40
x=40×0,5=20
3.
x=suma initiala
0,6x=ziua 1
x-0,6x=0,4x
0,4x ×0,4=0,16x=ziua 2
0,6x-264=0,16x
0,44x=264
x=600 lei
0,6x=600×0,6=360 lei
600-360=240
0,4x=240×0,4=96 lei