vanesa4529 vanesa4529
  • 06-02-2020
  • Mathematics
contestada

8) 7x + 2y = 24
8x + 2y = 30

Respuesta :

maryiamarshad115 maryiamarshad115
  • 06-02-2020

Answer:

x = 6 , y = -9

Step-by-step explanation:

7x + 2y = 24 ------------------- eq (1)

8x + 2y =30--------------------eq (2)

subtracting eq (1) from eq (2)

    8x + 2y = 30

    -7x - 2y =  -24

----------------------------

     x  - 0    =  6

hence x = 6

putting this value of x in eq (2) ,

=>  8 (6) + 2y = 30

=> 48 + 2y = 30

=> 2y = 30 - 48

=> y =  -18 / 2

=> y =  -9

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