Mathematics
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    x^2-150x+360=0
    7x²＋2x-5
    2(5+x+22)=50+20+212-2x
    2(5+x+22)=50+212-2x
    104.4+（22－x）*4.3＝（50+6.5x）/1.5
    0=0.44-((1+x)/x)*0.12*0.4
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x
    (x+2)÷3=2x

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