Question

Ajutatima vă rog la exercițiul 11 a,b si c,dau coroană

Answer 1

Răspuns:

Explicație pas cu pas:

x/y = 2/3

x = 2y/3

a)

x + 3y = 2y/3 + 3y = 2y/3 + 9y/3 = 11y/3

5x + 2y = 10y/3 + 6y/3 = 16y/3

(x + 3y)/(5x + 2y) = 11y/3 : 16y/3 = 11y/3 x 3/16y = 11/16

b)

6x - 2y = 12y/3 - 6y/3 = 6y/3 = 2y

4y - x = 4y - 2y/3 = 12y/3 - 2y/3 = 10y/3

(6x - 2y)/(4y - x) = 2y : 10y/3 = 2y x 3/10y = 6/10 = 3/5

c)

9x + 2y = 18y/3 + 2y = 6y + 2y = 8y

10x - 3y = 20y/3 - 9y/3 = 11y/3

(9x + 2y)/(10x - 3y) = 8y : 11y/3 = 8y x 3/11y = 24/11