1) 14/15-73/105=98/105-73/105=25/105=5/21 м вторая сторона
2) (14/15+5/21)*2=(98/105+25/105)*2=246/105=2 36/105=2 12/35 м периметр
3) 14/15*5/21=2/9 м² площадь
(1 2/3 - 37/75) * Х = 2 1/3 - 4 1/5
1 2/3 - 37/75 = 1 50/75 - 37/75 = 1 13/75
2 1/3 - 4 1/5 = 2 5/15 - 4 3/15 = - (4 3/15 - 2 5/15) =
= - (3 18/15 - 2 5/15) = - 1 13/15
1 13/75 * Х = - 1 13/15
Х = 1 13/75 : (- 1 13/15)
Х = 88/75 : (-28/15)
Х = - 88 *15/ 75*28
Х = - 22 / 5 * 7
Х = - 22/35
Ответ: Х = - 22/35.
<span>(1/2х+1/3х)*4/5=0,1</span>
5/6x*4/5=0.1
5/6x=5/4*0.1
x=6/4*0.1
x=1.5*0.1
x=0.15