1)2.5x-0.25=5.3x-7.25 2)3/7+2/4-2/6 3)4/7+1/2+2/7-1/34/7+1/2+3/7-1/3

x-0.25x+1=10.4x+0.25x-1 x=1+0.5x+0.25x+0.125x+0.0625x求x的值 X(X-1)=X 3道简单的分式方程,1.3/(1-x^) = 2/(1+2x+x) - 5/1-2x+x^2.5x/(x^+x-6) + (2x-5)/(x^-x-12) = (7x-10)/(x^-6x+8)3.(x+1)/(x+2) + (x+6)/(x+7) = (x+2)/(x+3) + (x+5)/(x+6) z=0.015x*x+y*x*0.05+(1-x-y)*2.5*(x+y) x>0.35.xy>0.70x+y x>=1,x x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x*x*x*x+2008x*x+2007x+2008(提示：x*x*x-1=（x-1）*（x*x+x+1）） x/x平方-x+2=2x/x+1 (X+1)X(X+2)X(X+3)=504 int x=2; x*7.2/x+1 等于几 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X x-1/0.25-x/12.5=1.2 x等于多少? 0.3(x+1)+0.25(100-x)=2/5x 2(x+1)-(3-x)=2(1.5x-2.5) 0.25x/x-2.5*0.6=0.5 x加30%x=52、x减40%x=15、50%x加x=31.5、x减1%x=19.8、x加25%x=2.5、x减15%x=8.5