8y-4=12-5y+9y

8y-4=12-5y+9y [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),'.') 先化简,在求值：6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y= -2分之5先化简,在求值：6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y= -2分之5 8y+12=8-8y-5y+10 y- 2y+1/2=9- 8-y/4 y-2y+1/2=9-8-y/4 4y+5y=?19y-y=? 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 数学题=y(y+3)-4(y+3)2=(y+3)(y-4y-12) (3y-1)/4-1=(5y-7)/6 9y-3-3=10y-14 9y-10y=-14+3+3 -y=-8 y=8 y-12/y=? 填空题 x+y/4=x-y/6=3x+12y+5/8 x= y= 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 解方程：(y+4)/5+y+6=(y+8)/2-(y+4)/3要过程 3y-2（10-y)=4y-5(8-y) 求x ,y 9x^2+4y^2-12x-8y+8=0 y(y+4)-y(y-3)-9y详细解答 5(y-4)-7(7-y)-9=12-3(9-y)