Question

1578-789×(5-3×((x-48)÷4-15))=0​

Answer 1

Răspuns:  x = 112

Explicație pas cu pas:

1 578 - 789 × { 5 - 3 × [(x - 48 ) : 4 - 15 ]} = 0​

789 × { 5 - 3 × [(x - 48 ) : 4 - 15 ]} = 1 578 - 0

789 × { 5 - 3 × [(x - 48 ) : 4 - 15 ]} = 1578

5 - 3 × [(x - 48 ) : 4 - 15 ] = 1 578 : 789

5 - 3 × [(x - 48 ) : 4 - 15 ] = 2

3 × [(x - 48 ) : 4 - 15 ] = 5 - 2

3 × [(x - 48 ) : 4 - 15 ] = 3

(x - 48 ) : 4 - 15 = 3 : 3

(x - 48 ) : 4 - 15 = 1

(x - 48 ) : 4 = 1 + 15

(x - 48 ) : 4 = 16

x - 48 = 16 × 4

x - 48 = 64

x = 64 + 48

x = 112 → numarul, aflat prin metoda mersului invers