Question

​ ​ ​ ​​ ​5x−6y=−25 ​4x−3y 20=0 ​​ , .

Answer 1

5x-6y=-25

4x-3y=0-20
4x-3y=-20

(5x-6y=-25)×4
(4x-3y=-20)×5

20x-24y=-100
20x -15y=-100
- se tienen que restar entre ellos

0x-9y=0
y= 0÷-9
y= 0



5x-6×0=-25
5x+0=-25
5x=-25-0
5x= -25
x= -25÷5
x= -5

S = {-5, 0}