Question

4 X + Y = 5
x + y = -1
​

Answer 1

Respuesta:

2x/2 = x y 16/2 = 8, de esta manera obtendrás x = 8.

Explicación paso a paso:

Answer 2

Respuesta:

4x+y = 5

x+y = -1

x = 2 ; y = -3

Método de Igualación :

1 ) Se despeja a " x " en la ecuación " 4x+y = 5 " :

4x+y = 5

4x+y-4x = 5-4x

y = 5-4x

y-5 = 5-4x-5

y-5 = -4x

(y/-1)+(-5/-1) = -4x/-1

-y+5 = 4x

(-y+5)/4 = 4x/4

(-y+5)/4 = x

x = (-y+5)/4

2 ) Se despeja a " x '' en la ecuación

" x+y = -1 " :

x+y = -1

x+y-y = -1-y

x = -1-y

3 ) Se igualan las ecuaciones resultantes " x = (-y+5)/4 " e " x = -1-y " :

(-y+5)/4 = (-1-y)

4(-y+5)/4 = 4(-1-y)

-y+5 = -4-4y

-y+4y = -4-5

3y = -9

3y/3 = -9/3

y = -3

4 ) Se sustituye a '' y = -3 " en la ecuación resultante " x = (-y+5)/4 " :

x = (-(-3)+5)/4

x = (3+5)/4

x = 8/4

x = 2

Verificación :

4(2)+(-3) = 5

4(2)-3 = 5

8-3 = 5

5 = 5

(2)+(-3) = -1

2-3 = -1

-1 = -1

Explicación paso a paso: