2(y+3)/5=3y/2-2(y-7)/3如题

2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 5(y-2)-7(y+3)=11(y+4) （2y-3)(-y+4)=(y-2)(y-5)-3y(y-7/3)解方程 (y^2)^4y-(-2y)^3y^6= (y-4)(3y+2)-(3y-7)(2y+1),其中y=4/3 2y+5/3y-6-y/2=5y-4/2y-4 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) 解方程：3y²-(2y+1)(y-2)=(y-5)(y+1) {2x+y/3-2y=0 2(2x+y)-5=7y 3-5-2y/5=y-4-7y/10+y+2/2 10y+2(7y-2)=5(4y+3)+3y怎么算 10y-2(7y-2)=5(4y+5)-3y 4(2y+5)-3y=7(y-5)+4(2y+1) y-7-8y=2y-3-5y 咋写?