Question

34,5÷.........=28,75.
.........÷2,5=7,296
..........÷3,4=22,125

Answer 1

34,5 ÷ x =28,75.
$\frac{34.5}{28.75} = x$
1,2  = x


x÷2,5=7,296
x = 7,296x2,5
x = 18,24


x÷3,4=22,125
x = 22,125x3,4
x = 75,225

Answer 2

Si divides 34,5 entre 1,2 = 28,75/ 
**Si multiplicas 7,296 x 2,5 = 18,24   Entonces...
18,24 / 2,5 =7,296
**Si multiplicas 22,125 x 3,4 = 72,225.  Entonces...
72,225 / 3,4 = 22,125.   
***  ¡Fácil?, ¿No?...