Question

40/72 = 30/x-6

tìm x

x =

Answer 1

Dễ mà

\(\frac{40}{72}=\frac{30}{x-6}\)

\(\Rightarrow\frac{5}{9}=\frac{30}{x-6}\)

\(\Rightarrow\frac{30}{54}=\frac{30}{x-6}\)

=> x = 6 + 54

=> x = 60

Answer 2

40/72 = 30/ x - 6 

=> 5/9 = 30 : x - 6 

=> 30 : x - 6 = 5/9 

=>        x - 6 = 30 : 5/9 

=>        x - 6 =54

=>        x      = 54+ 6 

=>        x      = 60 

Answer 3

40/72 = 30/X-6

=> 40 x (X-6) =30x72

=>        X-6   =30 x 72 : 40

=>        X-6   = 54

=>        X      = 54+6

=>        X      =  60