Question

Aflați valoare lui x pentru:
5 supra x= 4 supra 12, x supra 6= 9 supra 12, 7 supra x=8 supra 24, 7 supra 4= x supra 9
Cine ma poate ajuta,primește coroană!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

5/x = 4/12

5*12 = 4*x

60 = 4*x

x = 60 : 4 = 15

_____________

x/6 = 9/12

x*12 = 9*6

x*12 = 54

x = 54/12 = 27/6 = 9/2

_____________

7/x = 8/24

7*24 = 8*x

x = 7*24/8 = 21

____________

7/4 = x/9

9*7 = 4*x

x = 9*7/4 = 63/4

Answer 2

$\it \dfrac{5}{x}= \dfrac{4}{12} \Rightarrow \dfrac{x}{5}= \dfrac{12}{4} \Rightarrow \dfrac{x}{5}=3 \Rightarrow x= 5\cdot3=15\\ \\ \\ \dfrac{^{2)}x}{\ 6}= \dfrac{9}{12} \Rightarrow \dfrac{2x}{12}= \dfrac{9}{12} \Rightarrow 2x=9|_{:2} \Rightarrow x =4,5$

$\it \dfrac{7}{x}= \dfrac{8}{24} \Rightarrow \dfrac{x}{7}= \dfrac{24}{8} \Rightarrow \dfrac{x}{7}=3 \Rightarrow x=7\cdot3=21$