10y-2(7y-2)=5(4y+5)-3y

10y+2(7y-2)=5(4y+3)+3y怎么算 （2y-3)(-y+4)=(y-2)(y-5)-3y(y-7/3)解方程 (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai 解方程:10y-2(7y-2)=5(4y+3)-2y怎么解 解方程:1/5(3-2y)=2-4-7y/10+y-2/2 (-y+5+4y^2)-(-y^2+5y-4),其中y=-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) [-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y- {2x+y/3-2y=0 2(2x+y)-5=7y 解3y+5/3y-6=1/2+5y-4/2y-4 代数式4y² - 2y + 5 = 7,那么代数式2y² - y + 1