Question

afla necunoscuta: 1+{2×[3+(n-4)×5]:6}×7=8


VA ROG E URGENT!!! DAU COROANAA !!​

Answer 1

Răspuns:

Explicație pas cu pas:

1 + { 2 × [ 3 + ( n - 4 ) × 5 ] : 6 } × 7 = 8

{ 2 × [ 3 + ( n - 4 ) × 5 ] : 6 } × 7 = 8 - 1

{ 2 × [ 3 + ( n - 4 ) × 5 ] : 6 } × 7 = 7

2 × [ 3 + ( n - 4 ) × 5 ] : 6 = 7 : 7

2 × [ 3 + ( n - 4 ) × 5 ] : 6 = 1

2 × [ 3 + ( n - 4 ) × 5 ] = 1 × 6

2 × [ 3 + ( n - 4 ) × 5 ] = 6

3 + ( n - 4 ) × 5 = 6 : 2

3 + ( n - 4 ) × 5 = 3

( n - 4 ) × 5 = 3 - 3

n - 4 = 0 : 5

n - 4 = 0

n = 0 + 4

n = 4 → numarul, aflat prin metoda mersului invers