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6×5-2×(40-4×9+6) =....

Răspuns :

6×5-2×(40-4×9+6) =
30-2×(40-36+6)=
30-2×(4+6)=
30-2×10=
30-20=
10
 = 30 - 2x( 40 -36 +6) = 30 - 2 x 10 = 30 - 20 = 10