{2y +3x =0; 6(x -7) +8y =0.{ 8y = -12x; 6(x-7)-12x =0.{y =-3x/2 ; x = -7. ;
{x= - 7 ;y= 10,5.
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{2y - 3x=0; 6(x -7) +8y =0.{ 8y =12x; 6(x-7)+12x =0.{y =3x/2 ; x =7/3. ;
{x=7/2 ;y=7/3