1) 2,8-x = 7(0,2+0,5)
2.8-x = 1.4+3.5
-x = 2.1
x = -2.1
2) m-1,2(2-m) = 1+2m
m-2.4+m = 1+2m
0 ≠ 3.4
нет корней
3) 8y-9-(4y-5) = 1,2y-(4-5y)
8y-9-4y+5 = 1.2y-4+5y
4y-4 = 6.2y-4
-2,2y = 0
y = 0
Множество решений
1) 2,8-x = 7(0,2+0,5)
2.8-x = 1.4+3.5
-x = 2.1
x = -2.1
2) m-1,2(2-m) = 1+2m
m-2.4+m = 1+2m
0 ≠ 3.4
нет корней
3) 8y-9-(4y-5) = 1,2y-(4-5y)
8y-9-4y+5 = 1.2y-4+5y
4y-4 = 6.2y-4
-2,2y = 0
y = 0
Множество решений