Предмет: Математика, автор: SalikhSara

Решите уравнения.Пожалуйста

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Автор ответа: GlebGor1998
0
а)(х + 2) /5 = (3х - 8) / 4 - 2 ,умножим левую и правую часть уравнения на 20
    4(х +2) = 5(3х - 8) - 40
    4х + 8 = 15х - 40 - 40
     8 + 80 = 15х - 4х
     11х = 88
         х = 88 / 11
         х = 8
б) (4х - 1) / 3 = (2х + 1) / 5 + 6 , умножим левую и правую части уравнения     на  15 .  Получим : 5(4х - 1) = 3(2х + 1) + 90
     20х - 5 = 6х +3 + 90
     20х - 6х = 5 + 3 + 90
     14х = 98
         х = 98 / 14
         х = 7
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