Question

Tìm x, biết:

(-X). (+9)=72

Answer 1

(-x). (+9)=72

=> -x.9=72

=> -x = 72 : 9

=> -x = 8

=> x = -8

vậy____

Answer 2

( - x ) . ( + 9 ) = 72

- x = 72 : 9

- x = 8

=> x = -8

Vậy x = -8