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(8×8-32-12÷k)-(40-2×10)=9

Răspuns :

(64-32-12:k)-(40-20)=9
(32-12:k)-20=9
(32-12:k)=9+20
(32-12:k)=29
12:k=32-29
12:k=3
k=12:3
k=4
(8×8-32-12÷k)-(40-2×10)=9
(32-12:k)-20=9
32-12:k=20+9
32-12:k=29
12:k=32-29
12:k=3
k=12:3
k=4