Answers

2014-08-08T21:17:04+08:00
  7y+5x= 7
generally speaking there are an infinite # of solutions  to this equation
depending on the values you ascribe to y or  x
let say  x=0        then      7y+0 =7   >      y=1
             x= 1       then      7y+5 =7  >       y=  2/7
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