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{[7×(2+1)-2×3]:(1+2)}-[(3×2+5)-10]​

Răspuns :

Salut!

{[7×(2+1)-2×3]÷(1+2)}-[(3×2+5)-10] =

{[7×3-2×3]÷(1+2)}-[(3×2+5)-10] =

[(7×3-2×3)÷3]-[(3×2+5)-10] =

[(21-2×3)÷3]-[(3×2+5)-10] =

[(21-6)÷3]-[(3×2+5)-10] =

(15÷3)-[(3×2+5)-10] =

5-[(3×2+5)-10] =

5-[(6+5)-10] =

5-(11-10) =

5-1 =

4