Question

tìm x biết : -8/11.x=2/5.1/4

a) x=15/80

b) x=-2/75

c) x=11/90

d)-11/80

Answer 1

\(-\dfrac{8}{11}.x=\dfrac{2}{5}.\dfrac{1}{4}\)

\(-\dfrac{8}{11}.x=\dfrac{2}{20}\)

\(-\dfrac{8}{11}.x=\dfrac{1}{10}\)

\(x=\dfrac{1}{10}:-\dfrac{8}{11}\)

\(x=-\dfrac{11}{81}\)

Chọn d

Answer 2

D nha