Question

va rog 5 si 6 
 



puneti intr-un singur ex.


va mult

Answer 1

5.
a=varsta tata
b=varsta mama
c=varsta fiu
d=varsta fiica
a+b+c+d=85
b+15=c+15+d+15      b+15=c+d+30   b-15=c+d     
b=a-4                                                      a-4-15=c+d
c=d+3
a+a-4+a-4-15=85
3a=108
a=36 ani tatal
b=36-4=32 ani mama
c+d=32-15=17
d+3+d=17
2d=14
d=7 ani fiica
c=7+3=10 ani fiul


6.
a=nr fursecuri
a/5=Ana
5a/5-a/5=4a/5 =rest
4a/5×1/4=a/5=Dan
4a/5-a/5=3a/5=rest
3a/5×1/2=3a/10=Mara
3a/5-3a/10=3a/10 =9 fursecuri
3a=90
a=30 fursecuri

verificare
30×1/5=6 fursecuri a mancat Ana
30-6=24
24×1/4=6 fursecuri a mancat Dan
24-6=18
18 × 1/2=9 fursecuri a mancat Mara
18-9=9 fursecuri au ramas