2y-1/3 -1=5y+1/8 - 3y+1/6x-1/0.3 - x+2/0.5=1.214.5- x+3/2.5=3x/2 - x-7/250/100（y-1)=30/100(y+1)+0.1x-4/0.2 -2.5=x-3/0.05已知 1-x/2与1- x+1/3 是互为相反树求X.重要是写出步骤要不我还是不会做.对了算这些如何算他们的

y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y (3y^2+8y-3)-6y(3y+2y-1)+9y 解方程：3y^2-(2y+1)(y-1)=(y-5)(y+1) 2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1 解方程3y^2-(2y+1)(y-2)=(y-5)(y-1) 解方程：3y²-(2y+1)(y-2)=(y-5)(y+1) [T,Y]=ode45(@rigid,[0 1],[rand(15,1)]);plot(T,Y(:,1),'-',T,Y(:,2),'-.',T,Y(:,3),'.',T,Y(:,4),'-',T,Y(:,5),'-.',T,Y(:,6),'.',T,Y(:,7),'-',T,Y(:,8),'-.',T,Y(:,9),'.',T,Y(:,10),'-',T,Y(:,11),'-.',T,Y(:,12),'-.',T,Y(:,13),'.',T,Y(:,14),'-',T,Y(:,15),'.') y-(y-1)/2=1-(2y-3)/5 y-y-1/2=3-y+2/5 y-1/y-2 - y-3/y-4=y-2/y-3 - y-4/y-5一共有四个分数哦~希望可以快一点~谢谢! 已知(3x+1)(3x-3)-3x+2)^2=-7,(y+7)(y-7)-y(y-7)=0,求8y^2-5y(-y+3x)+4y(-4y-5/2x)的值 102=8/(1+y)+8/(1+y)^2+8/(1+y)^3+8/(1+y)^4+108/(1+y)^5 求y=? x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x 5y∧2-(y-2)(3y+1)-2(y+1)(y-5) (y-4)(3y+2)-(3y-7)(2y+1),其中y=4/3 解分式方程（y+3)/(y^2+y)-1/(1-y)=4/y要过程