Question

Bài 1: Tìm số nguyên x, biết:

a, 1/9 = x/27

b, 4/x = 8/6

c, 3/ x -5 = -4/ x-2

d, x/-2 = -8/x

Answer 1

a,\(\dfrac{1}{9}\)=\(\dfrac{x}{27}\)

\(\dfrac{3}{27}\)= \(\dfrac{x}{27}\)

3=x

Vậy x =3

Answer 2

b,\(\dfrac{4}{x}\)=\(\dfrac{8}{6}\)

\(\dfrac{4}{x}\)=\(\dfrac{4}{3}\)

x=3

Vậy x = 3

Answer 3

d,\(\dfrac{x}{-2}\)=\(\dfrac{-8}{x}\)

x.x = (-2).(-8)

x² =16

x² = 4²

x = 4

Vậy x = 4