3-y/2+y=7y-6/8 怎么算

6y-(y+2分之y+2-y分之y)÷(y^3-4y-2y^2+8分之y) 怎么算 3-y/2+y=7y-6/8 怎么算 10y+2(7y-2)=5(4y+3)+3y怎么算 y (3y^2+8y-3)-6y(3y+2y-1)+9y 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解 谁教教这个怎么算啊?3y + 5 / 2y = 2y - 6 / 5y求y的值是多少,(3y + 5) / 2y = (2y - 6) / 5y [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),'.') 二元一次方程(x+y)/2+(x-y)/3=6,4(x+y)-5(x-y)=2怎么算 (y^2)^4y-(-2y)^3y^6= y-二分之一=二分之一y-2 7y+6=4y-3 怎么解 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 已知式子2y^2+3y+1=7的值.求-6y-4y^2+9的值!比如要说明2y^2+3y怎么转换成-6y-4y^2的! 8=7-2y 怎么算 方程7y-2y=25.5怎么算 8y+12=9y-2怎么算 =y(y+3)-4(y+3)²=(y+3)(y-4y-12)怎么算的 3y=2y+6怎么解? 5x y-2z=17 2x-3y 7z=8 6x 2=3(y 6z)怎么算