6x-2.5x=423x+2.5x=55（x-5.5）*8=62.8
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6x-2.5x=423x+2.5x=55（x-5.5）*8=62.86x-2.5x=423x+2.5x=55（x-5.5）*8=62.86x-2.5x=423x+2.5x=55（x-5.5）*8=62
6x-2.5x=423x+2.5x=55（x-5.5）*8=62.8
6x-2.5x=42
3x+2.5x=55
（x-5.5）*8=62.8
6x-2.5x=423x+2.5x=55（x-5.5）*8=62.8
3x+2.5x=55
（3+2.5）x=55
5.5x=55
x=10
（x-5.5）*8=62.8
x-5.5=62.8/8
x-5.5=78.5
x=78.5+5.5
x=84
6x-2.5x=42
（6-2.5）x=42
x=42/3.5
x=12
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