Răspuns :
Răspuns:
x+y+z=75
y=5+x
z=5x
x+5+x+5x=75
7x=75-5=70
x=10
y=5+10=15
z=5×10=50
a=primul nr.
b=al doilea nr.
c=al treilea nr.
a+b+c=75
b-a=5=>b=a+5
c:a=3=>c=a×3
a.__.
b.__.+5
c.__.__.__.
75-5=70(5 seg)
70:5=14(a)
14×3=42(c)
14+5=19(b)
Răspuns:
x+y+z=75
y=5+x
z=5x
x+5+x+5x=75
7x=75-5=70
x=10
y=5+10=15
z=5×10=50
a=primul nr.
b=al doilea nr.
c=al treilea nr.
a+b+c=75
b-a=5=>b=a+5
c:a=3=>c=a×3
a.__.
b.__.+5
c.__.__.__.
75-5=70(5 seg)
70:5=14(a)
14×3=42(c)
14+5=19(b)