alejandraaa901 alejandraaa901
  • 07-11-2019
  • Mathematics
contestada

10. 4x - 7y = 3
x - 7y = -15​

Respuesta :

queenlanitea
queenlanitea queenlanitea
  • 07-11-2019

Answer:

(2/5,-1/5)

Step-by-step explanation:

solve the second equation for x

x = -7y - 1

replace the x in the first equation

4•(-7y-1) - 7y = 3

- 35y = 7

solve for y

35y = - 7  

y = - 1/5  

which gives us

   x = -7y-1

   y = -1/5

then use the y value to solve for x

   x = -7(-1/5)-1 = 2/5  

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