Ответ:

1) 2.3 - x = 1.2

x = 2.3-1.2

x = 1.1

2) 1.2-y = 0.3

y = 1.2-0.3

y = 0.9

3) 4.8-x=1.2

x = 4.8-1.2

x = 3.6

4) 2x-x = 9.5

x = 9.5

5)2.4y - 1.4y = 8

y = 8

6)3.15 - n =0

n = 3.15

7)65.9-m = 10

m =65.9-10

m = 55.9

8) 6.09 - k = 0.09

k = 6.09-0.09

k = 6

9) 3.4m-2.4m = 3

m = 3

10) 23.9 - p = 0.6

p = 23.9-0.6

p = 23.3