Question

2*28-2*[3*b-(45:5-2*4)]+48:12=50
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Answer 1

Răspuns:

2×28 - 2 × [3 × b - (45 : 5 - 2 × 4 ) ] + 48 : 12 = 50

56 - 2 × [ 3 × b - ( 9 - 8) ] + 4 = 50

56 - 2 × ( 3 × b - 1 ) = 50 - 4 = 46

2 × ( 3 × b - 1 ) = 56 - 46 = 10

3 × b - 1 = 10 : 2 = 5

3 × b = 5 + 1

b = 2 → numarul aflat prin metoda mersului invers

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