nashet2011
nashet2011 nashet2011
  • 13-06-2022
  • Mathematics
contestada

atleast need a hint about this

atleast need a hint about this class=

Respuesta :

jimrgrant1 jimrgrant1
  • 13-06-2022

Answer:

x + y = 2

Step-by-step explanation:

given

2x - 8 = 2y ( subtract 2y from both sides )

2x - 2y - 8 = 0 ( add 8 to both sides )

2x - 2y = 8 ( divide through by 2 )

x - y = 4

given

x² - y² = 8 ← factor left side as a difference of squares

(x - y)(x + y) = 8 ← substitute x - y = 4

4(x + y) = 8 ( divide both sides by 4 )

x + y = 2

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