1)(8x + 5,2)/2,4 = 11/2 2)4/1,6 = (7x - 2)/10,4
8x + 5,2 = 11/2 · 2,4 4/1,6 · 52/5 = 7x -2 26/10,4=5,2/2,08=
8x + 5,2 = 11/2 · (2·5+2)/5 4 ÷ 8/5 · 52/5 = 7x - 2 2,6/1,04=1,3/0,52
8x + 5,2 = 11/2 · 12/5 4 · 5/8 · 52/5 = 7x - 2 13/52=4/8/5
8x + 5,2 = 11 · 6/5 20/8 · 52/5 = 7x - 2
8x + 5,2 = 2,2 4 · 52/8 = 7x - 2
8x = 2,2 - 5,2 52/2+2/1 = 7x
8x = (-3) 52/2 + 4/2 = 7x
x = (-3)/8 56/2 = 7x
Проверка: 28 = 7x
(8 · (-3/8) + 5,2)/2,4 = 11/2 28/7 = x
(-3 + 5,2) ÷ 12/5 = 11/2 4 = x
2,2 · 5/12 = 11/2 (-x) = (-4) = (-4)/(-1) = 4
11/5 · 5/12 = 11/2
11/2 = 11/2 = 5,5 = 5,5