6x-2.5x=423x+2.5x=55（x-5.5）*8=62.8

X乘X减2.5X=6,　　求X! 6x-2.5x=423x+2.5x=55（x-5.5）*8=62.8 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) （X+X)+(X-X)+(X*X)+(X/X)=100 x+x-2.5+x-4=85 2*x*x+2.5x=13 x=? ２.5x-x=15 x =2.5(x-180) x*x*x*x*x=80000? 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, 9^x+4^x=2.5*6^x 解方程.0.8+x=1.2 2.5x=10 x+0.9x=57 10x-6x解方程.0.8+x=1.2 2.5x=10x+0.9x=57 10x-6x=128 6x+8*2.5x=312 2.5x-x=6+1.5 6x-x=2.5解方程 3x+6×2.5=16-x 2.5x+1=6x-13