Question

5 × + 4 y = 1
2 х - 3 y = 5​

Answer 1

Resposta:

5x+4y=1 · (3)

2x-3y=5 · (4)

15x+12y=3

8x-12y=20

Resolver x

23x=3+20

23x= 23

x=23/23

x=1

Agora y

15·(1)+12y=3

15+12y=3

12y=3-15

12y=-12

y=-12/12

y= -1

Answer 2

Resposta:

$5x + 4y = 1 \\ 2x - 3y = 5 \\ \\ 5x + 4 = 1 \: ( \times 2) \\ 2x - 3y = 5 \: ( \times - 5) \\ \\ 10x + 8 = 2 \\ - 10x + 15y = - 25 \\ 23y = - 23 \\ y = - \frac{23}{23} \\ y = - 1 \\ \\ 2x - 3y = 5 \\ 2x - 3 \times ( - 1) = 5 \\ 2x + 3 = 5 \\ 2x = 5 - 3 \\ 2x = 2 \\ x = \frac{2}{2} \\ x = 1 \\ \\ \\ x = 1 \\ y = - 1$

Bons estudos!