(3y-1)/4-1=(5y-7)/6 9y-3-3=10y-14 9y-10y=-14+3+3 -y=-8 y=8

(3y-1)/4-1=(5y-7)/6 9y-3-3=10y-14 9y-10y=-14+3+3 -y=-8 y=8 1.5y+8y-6y=2y-3 ｛4/(x+y)+6/(x-y)=3 ｛9/(x-y)-1/(x+y)=1 解方程:4(2y+3)=8(1-y)-5(y-2) 解8y+3=8-y-5y+2 14y=7 所以y=1/2 错在：原因 微分方程(1)(y'')^2+5y'-y+x=0;(2)y''+5y'+4y^2-8x=0;(3)(3x+2y)dx+( (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai 解方程：3y^2-(2y+1)(y-1)=(y-5)(y+1) 解方程3y^2-(2y+1)(y-2)=(y-5)(y-1) 10y+2(7y-2)=5(4y+3)+3y怎么算 解3y+5/3y-6=1/2+5y-4/2y-4 (5y+1)+ (1-y)= (9y+1)+ (1-3y); 解方程：(y+4)/5+y+6=(y+8)/2-(y+4)/3