Question

Determinati x din: {2014+[2014-(15:x+6)×2]:4}:4=628

Answer 1

Răspuns:

Explicație pas cu pas:

{2014 + [ 2014 - (15 : x + 6 ) × 2] : 4 } : 4 = 628

2014 + [ 2014 - (15 : x + 6 ) × 2] : 4 = 628 × 4

​2014 + [ 2014 - (15 : x + 6 ) × 2] : 4 = 2512

[ 2014 - (15 : x + 6 ) × 2] : 4 = 2 512 - 2014

[ 2014 - (15 : x + 6 ) × 2] : 4 = 498

2014 - (15 : x + 6 ) × 2 = 498 × 4

2014 - (15 : x + 6 ) × 2 = 1 992

(15 : x + 6 ) × 2 = 2 014 - 1992

(15 : x + 6 ) × 2 = 22

15 : x + 6 = 22 : 2

15 : x + 6 = 11

15 : x = 11 - 6

15 : x = 5

x = 15 : 5

x = 3 → numărul, aflat prin metoda mersului invers