Question

x-1/x-2 = 4/9 . tìm x

Answer 1

x-1/x-2=4/9

(=)9(x-1)/9(x-2)=4(x-2)/9(x-2)

(=)9x-9=4x-8

(=)9x-4x=-8+9

(=)5x=1

(=)x=1/5