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2. {350÷[491-3×(125-78)]+350}. Help Please


Răspuns :

2×{350÷[491-3×(125-78)]+350} =
= 2×[350÷(491-3×47)+350] =
= 2×[350÷(491-141)+350] =
= 2×(350÷350+350) =
= 2×(1+350) =
= 2×351 =
= 702