1.

Solve the following simultaneous equation using substitution method :x + y = 7x - y= 5

Answer»

ANSWER:

x+y=7

x-y=5. (1)

Step-by-step explanation:

  1. x+y=7
  2. y=7-x
  3. now PUTTING the VALUE of y on quation (1)
  4. x-y=5
  5. x-(7-x) =5
  6. x+x-7=5
  7. 2x=5+7
  8. 2x=12
  9. x=12/2
  10. x=6


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