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6+[15-(8:a×7+7)]×5=8:(1×4)+3×3​

Răspuns :

Mikelinaask

6+[15-(8:a×7+7)]×5=8:(1×4)+3×3

6+[15-(8:a×7+7)]×5=8:4+9

6+[15-(8:a×7+7)]×5=11

[15-(8:a×7+7)]×5=11-6

15-(8:a×7+7)=5:5

15-1=8:a×7+7

14-7=8:a×7

7:7=8:a

1=8:A

a=8×1=8

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