Question

calcula el termino desconocido​

Answer 1

                                                 Solución

Punto a:

8/20 = 10/x

2/5 = 10/x

2/5x = 10

2x = 10 · 5

2x = 50

x = 50/2

x = 25                   →           $\frac{8}{20}= \frac{10}{25}$

Punto b:

25/x = 15/9

25/x = 5/3

25 = 5x/3

25 · 3 = 5x

75 = 5x

75/5 = x

15 = x                       →            $\frac{25}{15}= \frac{15}{9}$

Punto c:

x/21 = 12/28

x/21 = 3/7

x = 3/7 · 21

x = (3 · 21)/7

x = 63/7

x = 9                           →                     $\frac{9}{21} =\frac{12}{28}$

$Magnoli0545E$