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    12/103+20/200+X/1000+(65.5-X)/1650=.3
    12/103+25/200+X/1000+(60.5-X)/1650=.3
    12/103+20/200+X/1000+(65.5-X)/1650=.3
    12/103+30/200+X/1000+(55.5-X)/1650=.3
    12/103+30/200+X/1000+(55.5-X)1650=.3
    x²/(0.1x)=0.0013
    x-0.36x=3198
    x²/(0.1x)=0.0013
    12/103+20/200+X/1000+(65.5-X)1650=.3
    12/103+25/200+X/1000+(60.5-X)1650=.3
    0.8 x-30+10=0.75 (x-10)
    5( 0.2x+7)-2( 0.3x-4)=47
    5( x+7)-2( x-4)=47
    x^2-16.55x-11=0
    x^2-83x-11=0
    x^2-6.6x-0.28=0
    x²+49+186=(x+5)²
    (x+5)²
    x²+0.0013x-0.00013=0
    50=30tanx

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