Question

6+[15-(8÷a×7+7)]×5=11
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Answer 1

Răspuns:

6 + [ 15 - ( 8 : a × 7 + 7 )] × 5 = 11

6 + [ 15 - ( 8/x × 7 + 7 )] × 5 = 11

6 + [ 15 - ( 56/x + 7 )] × 5 = 11

6 + ( 15 - 56/x - 7 ) × 5 = 11

6 + ( 8 - 56/x ) × 5 = 11

6 + 8 × 5 - 5 × 56/x = 11

6 + 40 - 280/x = 11

46 - 280/x = 11

-280/x = 11 - 46

-280/x = -35

280 = 35x

x = 280 : 35

x = 8