Question

11,12 va rog frumos cu explicatie​

Answer 1

12.

87•3 = a:4

87•3 = 261

A= 261•4 = 1056



11.

A) a•(b+c) = 50

A= 5

5•(b+c) = 50

B+c = 50:5 = 10

B= 20:a = 20:5 = 4

4+c = 10

C= 10-4 = 6



B) (b+c)•a = 50

A= 5

B+c = 50:5 = 10

(B-c) • a =10 , a = 5 , b-c = 10:5 = 2

B= 6

C= 4

Proba: (6+4)•5 = 10•5 = 50