Question

sabendo que xy= -3 determine a soluçao (x,y) do sistema {7/x + 6/y = -11/3
4/x + 3/y = -5/3

Answer 1

Oi Lucas

7/x + 6/y = -11/3

4/x + 3/y = - 5/3

(7y + 6x)/xy = -11/3

(7y + 6x)/-3 = -11/3

(7y + 6x)/3 = 11/3 

7y + 6x = 11

4/x + 3/y = -5/3

(4y + 3x)/xy = -5/3

(4y + 3x)/-3 = -5/3 

(4y + 3x)/3 = 5/3

4y + 3x = 5

sistema

6x + 7y = 11
3x + 4y = 5

6x + 7y = 11
6x + 8y = 10

8y - 7y = 10 - 11
y = -1

6x - 8 = 10
6x = 18
x = 3

S = (3, -1)