Question

−2x +y=8
x - 4y= - 5 ayuda;(

Answer 1

−2x +y=8

x - 4y= - 5

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−2x +y=8

2x - 8y= - 10 multiplicar x2

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-7y=-2

y= 2/7

hallar x

x-4(2/7)= -5

x-8/7=-5

$\frac{7x - 8}{7} = - 5 \\ \\ 7x - 8 = - 35 \\ \\ 7x = - 27 \\ \\ x = - \frac{27}{7}$

Answer 2

Respuesta:

x = 3

y = 2

Explicación paso a paso:

-2x + y = 8

x - 4y = -5

y = 8 - 2x

x - 4y = -5

x - 4(8 -2x) = -5

x - 32 + 8x = -5

9x - 32 = -5

9x = -5 + 32 = 27

9x = 27

x = 27/9 = 3

x = 3

y = 8 - 2x

y = 8 - 2(3)

y = 8 - 6

y = 2

x - 4y = -5

3 - 4(2) = -5

3 - 8 = -5

-5 = -5