Răspunsuri

2014-10-22T08:49:45+03:00
A*b=79⇒ a=79/b
b*c=49⇒c=49/b

b*(a-c)=b*(79-49)/b=79-49=30
2014-10-22T09:56:45+03:00
A*B=79
B*C=49
=>
B*(A-C)=A*B  -B*C = 79 - 49 = 30