14.5x+2.5x=5.1

14.5x+2.5x=5.1 （X+X)+(X-X)+(X*X)+(X/X)=100 x+x-2.5+x-4=85 5.1x-x=28. 2*x*x+2.5x=13 x=? X乘X减2.5X=6,　　求X! ２.5x-x=15 x =2.5(x-180) x*x*x*x*x=80000? 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 14.5x+2.5x=51解方程,并验算 14.5X+2.5X=51怎样 解方程 x*x*x=504 x*x*x=504 （x+x）+(x-x)+(x/x)=11.2 f(x)=x,x x+x=x+15 X(X-1)=X