Question

5x + 7y=-1
-3y + 4y= -24

Answer 1

-3y+4y = -24

y = -24

reemplazando

5x+ 7(-24)= -1

5x - 168 = -1

5x = 167

Answer 2

Respuesta:

x = 4 ; y = -3  ; (4,-3)

Explicación paso a paso:

-3x = -24 - 4y

-x = -8 - $\frac{4}{3}$y        /*-1

x = 8 + 4/3y

5(8 + 4/3y) + 7y = -1

40 + 20/3y +7y = -1

20/3y + 21/3y = -1 - 40

41/3y = -41

y = (-41 * 3) / 41

y = -1 * 3

y = -3

X = 8 + 4/3 * -3

X = 8 + (-4)

X = 4