Question

4x-9y=18-5x -6x+18y=0

Answer 1

Resposta:

x = 3; y = 1

Explicação passo a passo:

4x - 9y = 18 - 5x

4x + 5x - 9y = 18

9x - 9y = 18

9(x - y) = 18 (:9)

1.(x - y)= 2

x - y = 2

-6x+18y=0

- 6x = - 18y .(-1)

6x = 18y (:6)

x = 3y

X - y = 2

3y - y = 2

2y = 2

y = 1

x = 3y

x = 3.1

x = 3

R.:

x = 3; y = 1