Question

0.2x-0.2y=-1.8 -0.3x+0.5y=3.3 Lo necesito para mañana me urge porfavor

Answer 1

Respuesta:

x = - 6; y = 3

Explicación paso a paso:

0.2x - 0.2y = - 1.8

- 0.3x + 0.5y = 3.3

0.2x - 0.2y = - 1.8

0.2x + 1.8 = 0.2y

x = (0.2y - 1.8)/0.2............(1)

- 0.3x + 0.5y = 3.3

0.5y = 3.3 + 0.3x

(0.5y - 3.3)/0.3 = x...........(2)

Igualamos (1) y (2)

(0.2y - 1.8)/0.2 = (0.5y - 3.3)/0.3

Multiplicamos en aspa

(0.2y - 1.8)(0.3) = (0.5y - 3.3)(0.2)

0.06y - 0.54 = 0.1y - 0.66

0.12 = 0.04y

3 = y

Con el valor de y reemplazamos en (2)

(0.5y - 3.3)/0.3 = x

0.5y - 3.3 = 0.3x

0.5(3) - 3.3 = 0.3x

1.5 - 3.3 = 0.3x

- 1.8 = 0.3x

- 6 = x