Question

Porfavor es de sustitución
2x=3-y
2x-5=4y

Answer 1

Respuesta:

x = 17/10, y = -2/5

Explicación paso a paso:

[1] 2x = 3 - y   -->    y = 3 - 2x

[2] 2x - 5 = 4y

Subsituye [1] en [2]

2x - 5 = 4(3 - 2x)

2x - 5 = 12 - 8x

2x + 8x = 12 + 5

10x = 17

x= 17/10

Reemplaza x en [2]

2(17/10) - 5 = 4y

17/5 - 5 = 4y

(17-25)/5 = 4y

-8/5 = 4y

-8/20 = y

-2/5 = y

Comprueba x=17/10, y=-2/5 en [1]

2(17/10) = 3 - (-2/5)

17/5 = 3 + 2/5

17/5 = (15 + 2)/5

17/5 = 17/5