Răspunsuri

2014-09-06T13:26:44+03:00
A) 5x+5y=8x+4y => 3x-y=0 => y= -3x/:y  => -3x/y=1 =>x/y= -3 
b) 9x+12y=14x+7y =>5x-5y=0 =>5x=5y => x=y => x/y= 1
c) 15x -12y=14x-7y =>x-5y=o => x=5y  => x/y =5