7. c - a = 36
c: a = 5
_______
a=? , b =?
c |___| + 36→ |___|___|___|___|= 4 parti egale
a |___|
1) 36:4=9( o parte egala adica a )
2) 9 x 5=45 ( c )
8.M = F x 3
M - F = 52
________
M =? , F = ?
M |__| + 52 → |__|__| = 2 parti egale
F |__|
1 ) 52 : 2 = 26 ( o parte egala adica F )
2) 26 x 3 = 78 ( M )
9. f+ b = 63
b : f= 2
________
f=? , b=?
f |__|
→ 63
b |__|__|
1) 1 + 2 = 3 ( parti egale )
2) 63 :3=21 ( f )
3) 21 x 2 = 42 ( b )
