3-2（2y-1）=3(2y-1)-2

解方程3y^2-(2y+1)(y-2)=(y-5)(y-1) 解方程：3y^2-(2y+1)(y-1)=(y-5)(y+1) 已知：3x=8y.求（1）x+y/y (2)2x+3y/x-2y 微分方程y''-3y'+2y=5,y(0）=1,y'（0）=2求解过程 已知7/3*根号（9y）-y-2y*1/y=-2,求y的值 1.5y+8y-6y=2y-3 解方程(1-3y)^2+(2y-1)^2=13(y-1)(y+1) 已知y满足不等式(-y+1/2)-y＞2+（y+2/3）,化简/y+1/+/2y-1/=_____ 急! (3x-y)^2+(3x+y)(3x-y),x=1,y=-2 解3y+5/3y-6=1/2+5y-4/2y-4 微分方程y''=3√y,x=0,y=1,y'=2 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1