Question 9589

   7x + y  = 2  ............ (1)

   5x - 8y = 4  ............ (2)

   By Eq.(1)* 8, we get,

   56x + 8y =16 ............ (3)
  
   Eq.(2)+(3), we get

   61x = 20

   So x = {{{20/61}}}

   by replacing the value of x in Eq. (1), we get

   7*{{{20/61}}} + y = 2

   = {{{140/61}}} + y = 2
  
   = y = 2 - {{{140/61}}}
 
   = y = {{{122/61}}} - {{{140/61}}}

   y = {{{(122-140)/61}}}  =  {{{-18/61}}}

   so x = {{{20/61}}};  y = {{{-18/61}}};  Answer.


   gsm