а) 3.3 - (x - 6.7) = 100 3.3 - x + 6.7 = 100 10 - x = 100 -x = 90 x = -90
б) -5/7 - (m - 1) = 11/14 -5/7 - m + 1 = 11/14 -5/7 - m = 11/14 - 1 -5/7 - m = 3/14 -7/14 - 5m = 3/14 -5m = 10/14 m = -2/7
в) 1 5/7 - (y + 2/3) = 1 1/2 1 5/7 - y - 2/3 = 1 1/2 12/7 - y - 2/3 = 3/2 (12 - 14y)/7 = 3/2 12 - 14y = 21/2 24 - 28y = 21 28y = 3 y = 3/28
а) 3.3 - (x - 6.7) = 100
3.3 - x + 6.7 = 100
10 - x = 100
-x = 90
x = -90
б) -5/7 - (m - 1) = 11/14
-5/7 - m + 1 = 11/14
-5/7 - m = 11/14 - 1
-5/7 - m = 3/14
-7/14 - 5m = 3/14
-5m = 10/14
m = -2/7
в) 1 5/7 - (y + 2/3) = 1 1/2
1 5/7 - y - 2/3 = 1 1/2
12/7 - y - 2/3 = 3/2
(12 - 14y)/7 = 3/2
12 - 14y = 21/2
24 - 28y = 21
28y = 3
y = 3/28