А = {а,е}
Ответ: множество состоит из 2 элементов
(419/10-x)*10/47=7/2
419/47-10/47x=7/2
838-20x=329
-20x=329-838
-20x=-509
x=509/20
x=25.45
А) 100-12 во второй степени = 76
1) 12*12 = 24
2)100-24= 76
б) 5*4 в третьей степени = 320
1) 4*4*4 = 64
2) 5*64=320
G - e = 4
e + 4 = g
g - 4 = e
Приводим к общему знаменателю и вычисляем.
2/3 + 5/8 = 16/24 + 15/24 = 31<span>/24
7</span>/12 - 3/8 = 14/24 - 9/24 = 5<span>/24
</span><span>11/16 - 5/8 = </span>11/16-10/16 = 1/<span>16
</span><span>5/35 + 3/10 = </span>10/70 + 21/70 = 31/<span>70
</span><span>8/15 - 4/9 = </span>24/45 - 20/45 = <span>4/45
</span><span>4/15 + 7/12 = </span>16/60 + 35/60 = <span>51/60
</span><span>11/48 - 5/36 = </span>33/144 - 20/144 = <span>13/144
</span><span>4/5 - 2/3 + 4/15 = </span>12/15 - 10/15 + 4/15 = <span>6/15
</span><span>7/8 + 11/12 - 5/6 = </span>21/24 + 22/24 - 20/24 = <span>23/24</span><span />