Question

giúp mk voi a

Answer 1

a 12

 

Answer 2

c/ \(\dfrac{-6}{7}\)= \(\dfrac{x}{-14}\)

x = \(\dfrac{\left(-6\right).\left(-14\right)}{7}\)= 12

d/ \(\dfrac{-8}{3}\)= \(\dfrac{-16}{x}\)

x = \(\dfrac{3.\left(-16\right)}{-8}\)= \(\dfrac{9}{4}\)= 2,25

Answer 3

\(c.\dfrac{-6}{7}=\dfrac{x}{-14}\Leftrightarrow x=\dfrac{-6.\left(-14\right)}{7}=12\\ d.\dfrac{-8}{3}=\dfrac{-16}{x}\Leftrightarrow x=\dfrac{3.\left(-16\right)}{-8}=6\)

Answer 4

\(\dfrac{-6}{7}=\dfrac{x}{-14}\)

\(\left(-6\right).\left(-14\right)=7x\)

84=7x

x=84:7

x=12

Vậy ....

d,\(\dfrac{-8}{3}=\dfrac{-16}{x}\)

(-8)x=(-16).3

(-8x)=-48

x      = (-48):(-8)

x       =   6

Vậy x = 6

Answer 5

c.\(\dfrac{-6}{7}=\dfrac{x}{-14}\)                                                                                                                             \(\dfrac{-6}{7}=\dfrac{x}{-7}\)                                                                                                                           chuyển dấu   =>x = -6

Answer 6

D 6

Answer 7

d 6

 

Answer 8

c.\(\dfrac{-6}{7}\) = \(\dfrac{x}{-14}\) 

x = \(\dfrac{\left(-6\right).\left(-14\right)}{7}\) = 12

d/ \(\dfrac{-8}{3}\)= \(\dfrac{-16}{x}\)

x = \(\dfrac{3.\left(-16\right)}{-8}\) = 6

Answer 9

c) \(\dfrac{-6}{7}=\dfrac{x}{-14}\) 

\(\Rightarrow x=\dfrac{-6.-14}{7}=12\) 

d) \(\dfrac{-8}{3}=\dfrac{-16}{x}\) 

\(\Rightarrow x=\dfrac{-16.3}{-8}=6\)

Answer 10

c=12

d=6