x-(0.1x+20)=28-0.7x
x-(0.1x+20)=28-0.7x怎么解
(X+X)+(X-X)+(X*X)+(X/X)=100
(x-22)+(x-24)+(x-27)+(x-20)=x
x(x^2-1)+2x^2 *(x+1)-3x*(2x-5)=x(3x^2-4x)-28
解方程 X+40%X=28 X-20%X=10.4 X+34
30%X-30%X-[(X-30%X)×20%-2]-30%X=28怎么解
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
(X-X*20%-18-(X-X*20%-18)*10%=X*1/2-3(过程)
(x+2005)/ (x+2004)+(x+2007)/(x+2006)=(x+2008)/(x+2007)+(x+20
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
(X-10000)/(X/0.17)=0.1,求X,
X+13%X-28%X=3.