（x+3）（2x+5）-x（3x-1）=15
    x + 1 = 1
    4x - 15 = x
    2x - 4 = 20
    x + x2 = 84
    x + 2x = 84
    84 - x = 2 ( 84 - x)
    x + x + 2 = 84
    x + 1 = x - 1
    x^5-15*x^4+85x^3-225*x^2+274x-121
    0.8x＝208
    8x
    11x + 5 = 26 + 13x - 21 - 2
    6x + 14 + x = 26 + 7x - 12
    2x + 5 - 10x + 11 = 0
    5x + 4 = 7x + 2 - 2x
    2x + 1 = 4
    227.76=0.105*X+X
    227.76=0.105/X+X
    227.76-X=0.105/X

Home page << page31275 page31276 page31277 page31278 page31279 ... ... page31281 page31282 page31283 page31284 page31285 >> Last page 31306 pages in total