Question

Se considera proportia 7x supra 3y = 4 supra 3. Determinati rapoartelele. a) 2y - x supra x b) 2x - y supra y c) 4x - y supra x​

Answer 1

Răspuns:

Explicație pas cu pas:

7x/3y = 4/3

x/y = 4/3 : 7/3 = 4/3*3/7 = 4/7

y/x = 7/4

_______

a)

(2y - x)/x = 2y/x - 1 = 2*7/4 - 1 = 7/2 - 2/2 = 5/2

b)

(2x - y)/y = 2x/y - 1 = 2*4/7 - 1 = 8/7 - 7/7 = 1/7

c)

(4x - y)/x = 4 - y/x = 4 - 7/4 = 16/4 - 7/4 = 9/4