已知x-2y/3y-x=2/3,则y/x的值是
问题描述:
已知x-2y/3y-x=2/3,则y/x的值是
答
(x-2y) / (3y-x) = 2 / 3
3(x-2y) = 2(3y-x)
3x - 6y = 6y - 2x
5x = 12y,代入原方程检验通过,
故y/x = 5/12