2х-3,5×2=7+3,6×2х-3,6×1
2х-7=7+7,2х-3,6
2х-7=7,2х+3,4
2х-7,2х=7+3,4
-5,2х=10,4
Х=-2
8*3125-5186=19814
1.000.000*9/1000=9000
872/8*7=763
а) 5 - 1 5/6 = 4 6/6 - 1 5/6 = 3 1/6
в) 3 5/6 -1,5 - 2 1/3 = 0
1) 3 5/6 - 1 5/10 = 3 5/6 -1 1/2 = 2 2/6 = 2 1/3
2) 2 1/3 - 2 1/3 = 0
64 * 4 = 256
56 * 7 = 392
78 : 6 = 13
68 : 4 = 17
(96 : 4 + 90 : 6) * 8 = (24 + 15) * 8 = 39 * 8 = 312