saytada725 saytada725
  • 22-04-2020
  • Mathematics
contestada

-3x + 4y = 20
6x + 3y = 15

Respuesta :

devishri1977
devishri1977 devishri1977
  • 22-04-2020

Answer:

x = 0

y = 5

Step-by-step explanation:

-3x + 4y = 20  -------------(i)

6x + 3y = 15  --------------(ii)

(i) * 2     - 6x + 8y = 40

(ii)           6x + 3y = 15           (Now add, x will be eliminated}

                     11y =  55

y = 55/11

y = 5

Plug in y =5 in equation (i)

-3x + 4*5 = 20

-3x + 20 = 20

-3x = 20 - 20

-3x = 0

x = 0  

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