(5y+1)÷6=(9y+1)÷8-(1-y)÷3
(5y+1)÷6=(9y+1)÷8-(1-y)÷3
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
先化简,再求值[(2x+y)^2-(2x+y)(2x-y)-y(5x+y)]÷(1/2y),其中x-y=2
(3y-1)/4-1=(5y-7)/6 9y-3-3=10y-14 9y-10y=-14+3+3 -y=-8 y=8
(y+2)÷4-(2y-3)÷6=1 求y的值
(5Y+1)/6=(9Y+1)/8-(1-Y)/3
5y+1/6=9y+1/8-1-y/3
计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^
x+y-z=0 x+2y-z=3 2x-3y+2z=5 y÷3-x+1÷6=3 2(x-y÷2))=3(x+y÷18)
一道整式的计算题!先化简,再求值:(y-2)(y+3)-4y(y-1) ÷2y,其中y=二分之一
化简求值【(x+2Y)的平方-(x+Y)(3x-Y)-5y的平方】÷(2x),其中x=-2,y=2/1
解方程:3y^2-(2y+1)(y-1)=(y-5)(y+1)