Răspuns :
a+b = 72
a : b = 7
a = 7b
7b + b = 72
8b = 72
b = 72 : 8
b = 9
a = 7x9 = 63
63 + 9 = 72
63 : 9 = 7
a : b = 7
a = 7b
7b + b = 72
8b = 72
b = 72 : 8
b = 9
a = 7x9 = 63
63 + 9 = 72
63 : 9 = 7
a+b=72 a|------|------|-------|-------|-------|-------|--------|
a:b=7 b|------|
---------------- 72:8=9(b) a=9x7=63
a=? b=?
----------------
a:b=7 b|------|
---------------- 72:8=9(b) a=9x7=63
a=? b=?
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