Răspuns :
a : a + a × a + a : a = 66
1 + a × a + 1 = 66
1 + a × a = 66 - 1
1 + a × a = 65
a × a = 65 - 1
a × a = 64
8 × 8 = 64
a = 8
a = b : 2
a = c : 3
b : 2 = 8
b = 8 × 2
b = 16
c : 3 = 8
c = 8 × 3
c = 24
( a - b : 2 ) × c : 9 =
( 8 - 16 : 2 ) × 24 : 9 =
( 8 - 8 ) × 24 : 9 =
0 × 24 : 9 =
0 : 9 = 0
Răspuns:
a : a + a × a + a : a =66.
1+a²+1=66
a²=66-2=>a=√64=>a=8
a=2b/4=>a=b/2=>b=2a=>b=2·8=>b=16
a=c/3=>c=3a=>c=3·8=>c=24
_________
(a-b:2)·c:9=(8-16:2)·24:9=(8-8)·24:9=0·24:9=0