2(y+9)-12=y+(8-2)怎么解

2(y+9)-12=y+(8-2)怎么解 8y+12=9y-2怎么算 log(4)y+log(2y)=9怎么解 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解 2x+y=10怎么解 求Xx+2y=8求Y 2(5y+1)=2(9y-3)-3y怎么解 这个方程怎么解2x=8y 20x+12y=2300x=?y=? 由X/Y=2Y/X-Y 怎么解得x=2y? (y-1)(y-2)=2y(1-y)怎么解?速求!明天过期 [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 (3y^2+8y-3)-6y(3y+2y-1)+9y (7-y)y=12怎么解 12y+8=8y+18怎么解方程? 12y 8=8y 18怎么解方程? 2Y×3.14+2Y=20.56怎么解 (120/y)^2+y^2=61怎么解 y- 2y+1/2=9- 8-y/4 y-2y+1/2=9-8-y/4