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a×b=42 iar c×a=24 calculeaza a×(b-c):2=​

Răspuns :

Răspuns:

a×b=42

c×a=24

a×(b-c):2=?

(a×b-a×c):2=

(42-24):2=

18:2=9

a×b=42

6×7=42 ( stim din tabla inmultirii cu 6 ca 6×7=42 )

a=6

6×b=42

b=42:6

b=7

c×a=24

c×6=24

c=24:6

c=4

6×(7-4):2=6×3:2=18:2=9