решите плиз 3 уравнения 1)2 12х-1 58=2 34 2) 14+х:3 59=716 3)4 25 : x- 2 35=710

  • 1) 2 1/2X — 1 5/8 = 2 3/4 
        2.5X — 1.625 = 2.75 
        2.5X = 4.375 
        X = 1.75 
        X = 1 3/4
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    2) 1/4 + X : 3 5/9 = 7/16 
        X : 3 5/9 = 7/16 — 1/4 = 7/16 — 4/16 = 3/16 
        X : 32/9 = 3/16 
        X = 3/16 * 32/9 = 32/48 = 2/3 
        X = 2/3 
    =====================
    3) 4 2/5 : X — 2 3/5 = 7/10 
        4.4 : X = 0.7 + 2.6 
        4.4 : X = 3.3 
         X = 4.4 : 3.3 
         X = 44/33 =1 11/33 = 1 1/3 
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