У=-6х+2
у=18
18=-6х+2
-6х=18-2
-6х=16
х=-16/6=-8/3=-2 2/3
Ответ:-2 2/3
(0,7 * 10) - (5 * 10) - 32 = 7 - 50 - 32 = -75
84 : 6 - (11 - 5) = 14 - 6 = 8
90 : 3 *2 +16 * 2 = 30 *2 + 32 = 60 + 32 = 92
(47 + 23) - 56 : 4 = 70 - 14 = 56
96 : 4 + 20*3 = 24 + 60 = 84
75/100=3/4
80/1000=2/25
30/1000=3/100
55/100=11/20
30/100=3/10=0.3