Question

[2x-3y= -19
5x+7y=25


me ajuda

Answer 1

Resposta

2x-3y=-19 x(-5)

5x+7y=25 x(2)

-10x+15y= 95

10x+14y= 50

29y= 145

y=145/29

y= 5

2x-3y= -19

2x-3*5=-19

2x-15=-19

2x =-19+15

2x= -4

x=-4/2=-2

S={(-2,5)}