你好!我又来帮你解题了.若5x^2-7xy-6y^2=0,求3x/y的值.5x^2-7xy-6y^2=0(5x+3y)(x-2y)=05x+3y=0,解得：5x=-3y,x/y=-3/5,x-2y=0,解得：x=2y,x/y=2,所以3x/y=3*(-3/5)=-9/53x/y=3*2=6综上,3x/y的值有两个为：-9/5和6....