102×2.5-2.5X=10.

102×2.5-2.5X=10. x+x-2.5+x-4=85 ２.5x-x=15 x =2.5(x-180) 2*x*x+2.5x=13 x=? X乘X减2.5X=6,　　求X! z=0.015x*x+y*x*0.05+(1-x-y)*2.5*(x+y) x>0.35.xy>0.70x+y 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) 2x:16-2x=2.5x:20-2.5x x=爱克斯（未知数） 2.5x+(x+10)*2.5=300 80/x=2.5×80/(x+2.5) 解方程:2.5x×2.5x×1.6x=7290解方程:2.5x×2.5x×1.6x=7290 2.5X-0.5X=18.5 x/3.14=8 X+2.5×2.25％X=56254=X-X20％ 2X+2.5(x+0.04)=11.1X=多少 15=2.5X一0.5X X=? 5x+x-2.5x=56解方程, 13.5x+9x-2.5x=210解方程