Răspuns :
a /__/__/__/
b /__/
c /__/__/__/ + 5
suma = 75
75 - 5 = 70 ( 7 parti egale )
70 : 7 = 10 ( b )
10 × 3 = 30 ( a )
30 + 5 = 35 ( c )
b /__/
c /__/__/__/ + 5
suma = 75
75 - 5 = 70 ( 7 parti egale )
70 : 7 = 10 ( b )
10 × 3 = 30 ( a )
30 + 5 = 35 ( c )
a+b+c=75
a=bx3
c=a+5
a /___/___/___/ }
b /___/ } 75
c /___/___/___/_/ }
1)Aflam suma partilor egale.
75-5=70
2)Aflam al doilea numar.
70:7=10
3)Aflam primul numar.
10x3=30
4)Aflam al treilea numar.
30+5=35
R:30,10,35
Verificare:30+10+35=75
sau
a+b+c=75
a=bx3
c=a+5 de aici rezulta ca c=bx3+5
bx3+b+bx3+5=75/-5
bx7=70
b=70:7
b=10
a=bx3
a=10x3
a=30
c=a+5
c=30+5
c=35
R:30,10,35
Verificare:30+10+35=75
a=bx3
c=a+5
a /___/___/___/ }
b /___/ } 75
c /___/___/___/_/ }
1)Aflam suma partilor egale.
75-5=70
2)Aflam al doilea numar.
70:7=10
3)Aflam primul numar.
10x3=30
4)Aflam al treilea numar.
30+5=35
R:30,10,35
Verificare:30+10+35=75
sau
a+b+c=75
a=bx3
c=a+5 de aici rezulta ca c=bx3+5
bx3+b+bx3+5=75/-5
bx7=70
b=70:7
b=10
a=bx3
a=10x3
a=30
c=a+5
c=30+5
c=35
R:30,10,35
Verificare:30+10+35=75