Tìm biết: x 10 - = 1

Question

Tìm X biết: 

X x 10 - x = 1

Answer 1

 

Answer 2

X x 10 - X = 1

X x 10 - X x 1 = 1

X x (10 - 1) = 1

X x 9 = 1

X = 1:9 hay X = 1/9