Răspuns :
|____b____|__30___|
|_______a________|
a=b+30
a+b=140
b+30+b=140
2b=140-30
2b=110
b=110:2
b=55
a=55+30=85
|_______a________|
a=b+30
a+b=140
b+30+b=140
2b=140-30
2b=110
b=110:2
b=55
a=55+30=85
b |-|
a |-| +30. =140
Egalam marimile
140-30=110
Cat este b?
110:2=55
Cat este a?
55+30=85
R:a=85, b=55. V:85+55=140
a |-| +30. =140
Egalam marimile
140-30=110
Cat este b?
110:2=55
Cat este a?
55+30=85
R:a=85, b=55. V:85+55=140