Помогите найти X в уравнение.[tex]a)5/x=20/17\\b)7/8=21/x\\c)x/3=1/24[/tex]

а) 5/x = 20/17

x = (5*17)/20

x = 4.25

b) 7/8 = 21/x

x = (21*8)/7

x = 24

c) x/3 = 1/24

x = (3*1)/24

x = 0.125