Răspuns :
13 15000:40 = 375 planetariumuri /an
14 8495*375=3185625 ron
15 (3x+250):25=100
3x+250=2500
3x=2250
x=750
14 8495*375=3185625 ron
15 (3x+250):25=100
3x+250=2500
3x=2250
x=750
13.
15000:480 luni =31,25
14.
31,25x8495=265468,75 lei
15.
(3x+250):25-99=1
(3x+250):25=100
3x+250=2500
3x=2250
x=750 lei
15000:480 luni =31,25
14.
31,25x8495=265468,75 lei
15.
(3x+250):25-99=1
(3x+250):25=100
3x+250=2500
3x=2250
x=750 lei