8x-8=4x-4
    1.1^x=5
    （25.759+x）×0.85＝51.519+67.078-x
    （25.759+x）×0.85＝51.519+68.078-x
    （25.759+x）×0.85＝51.519+69.078-x
    （25.759+x）×0.85＝51.519+70.078-x
    （25.759+x）×0.85＝51.519+70.078-x
    （25.759+x）×0.85＝51.519+71.078-x
    （25.759+x）×0.85＝51.519+71.078-x
    （25.759+x）×0.85＝51.519+72.078-x
    （25.759+x）×0.85＝51.519+72.078-x
    25+x＝97.402-x
    5x+x➗5=52
    5x+x=52×5
    6x^2-x-1=0
    5x+1=4.7(x+1)
    0.9+1.5x=0.97(x-1)
    0.9+1.5x=0.97(x+1)
    -2X（X+5）=3（X-5）-6
    (2x - 1) / (x + 1)²

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