Question

1. Calculati- 100; (110:5-96:(203-65 ori 3)
2.Doua penare si 5 carti costa 95 lei,iar doua penare si trei carti costa 65 lei. Aflati
-cat costa o carte
- cat costa doua penare
-cat costa 4 penare si 7 carti
Repede dau coroana

Answer 1

1 ) 100 : [110 : 5 -96 : (203 -65*3)] =
=100 : (22 - 96 : (203 - 195) =
=100 : (22 - 96 : 8 )=
=100 : (22-12 )=
=100 :10=
=10

2)
$- \left \{ {{2p+5c=95} \atop {2p+3c=65}} \right.$

2c = 95-65
2c=30
c=30:2
c=15

2p+3*15 = 65
2p +45 =65
2p = 65-45
2p= 20

Daca :

2p +5c = 95  ( +2 )
4p +7c = 97

Answer 2

2p+5c=95 
2p+3c=65
2c= 30
c=30:2
c=15
2p+3*15=65
2p=65-45
2p=20 lei 
2*20+7*15= 40+105=145 lei 







100:[110:5-96:(203-65*3)]
=100:[110:5-96:(203-195)
=100:(110:5-96:8)=
=100:(22-12)=100:10=10