Răspuns :
Răspuns:
- 30 lei costa o papusa
- 60 lei costa o masinuta
Explicație pas cu pas:
p = papusa
m = masinuta
7p + 9m = 750
1m = 2p
7p + 9 x 2p = 750
7p + 18p = 750
25p = 750
p = 750 : 25
p = 30 lei costa o papusa
1m = 2p = 2 x 30 = 60 lei costa o masinuta
Răspuns:
[tex]7p+9m=750\\\\m=2p\\\\7p+18p=750\\\\25p=750= > p=750:25= > p=30lei-papusa\\\\m=2*30= > m=60lei-masinuta\\\\\\\\[/tex]