Question

b) x +2y = 5

2x+y=-2​

Answer 1

Resposta:

x=-3 e y= 4

Explicação passo a passo:

x+2y=5

2x+y=-2

x +2y=5

x = 5 - 2y

2x+y=-2

2(5-2y)+y=-2

10 - 4y + y= -2

-4y+y=-2-10

-3y= -12

y= 12/3

y=4

x+2y=5

x+2*4=5

x + 8 = 5

x= 5-8

x=-3