Respuesta :

7⁄28 = 25⁄x
7x = 25x28
7x = 700
x = 100

answer C. 100
altavistard
In other words, solve for x.  Cross multiply this equation:  7x = 25*28.
Divide both sides by 7 to isolate x.  x = 25 * 4 = 100