Question

1000-[5+2x(100+4xa)-124:4]=754.

Answer 1

Răspuns:

9

Explicație pas cu pas:

$1000-[5+2 \times (100+4 \times a)-124:4]=754$

$5 + 2 \times (100 + 4 \times a) - 31 = 1000 - 754$

$5 + 2 \times (100 + 4 \times a) = 246 + 31$

$2 \times (100 + 4 \times a) = 277 - 5$

$100 + 4 \times a = 272 : 2$

$4 \times a = 136 - 100$

$a = 36 : 4$

$\bf a = 9$