140+150+160+170+180=( )x( )
140+150+160+170+180=( )x( )
解方程;x+40%=140 75%x+90=150 (4.5减50% )x=180
6x=4(150-x)
5*(x-2)=4*(x+3) 2x+(50-x)*4=140 3x-(8-x)=20*4 200x=(x-0.5)*2
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
20%x+80%(x-180)=32%(x+x-180)怎么算
(x-5)+(x+5)+2x+(x÷2)=180的解
f(x)=x²+3x|x-2|
f(x)=-x^2+2x(x>0) 0(x=0) x^2-2x(x
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8