Question

5+6x7-8x(x-9)-76:2=1

Answer 1

5+6x7-8×(x-9)-76:2=1

5+42-8×(x-9)-76=2

47-8×(x-9)=78

8×(x-9)=31

(x-9)=31-8

(x-9)=23

x=32

Answer 2

5 + 6 × 7 - 8 × ( X - 9 ) - 76 : 2 = 1

5 + 42 - 8 × ( X - 9 ) - 38 = 1

47 - 8 × ( X - 9 ) = 1 + 38

47 - 8 × ( X - 9 ) = 39

8 × ( X - 9 ) = 47 - 39

8 × ( X - 9 ) = 8

x - 9 = 8 : 8

x - 9 = 1

x = 1 + 9

x = 10 → numarul, aflat prin metoda mersului invers