6.
Notam c - castraveti; r - rosii,
r = 12
_____________
c = 6 + r
c = 6 + 12
c = 18
_____________
6 + 12 = 18
=> 18 - 12 = 6
=> 18 - 6 = 12
______________
7.
Notam m - nr. de cutii cu ceai de musetel; t - nr. de cutii cu ceai de tei,
m = 98
______________
t = m - 25
t = 98 - 25
t = 73
______________
98 - 25 = 73
=> 73 + 25 = 98
=> 25 + 73 = 98
______________
Succes!
