Ответ:

a) X=42,2

b) a=3,78

c) X=42,66

d) a=21,87

e) a=30,8

f) a=5,45

Ответ:

a)

x + 12 = 54.2

x = 54.2 - 12

x = 42.2

b)

4.8 - a = 1.02

x = 4.8 - 1.02

x = 3.78

c)

45 - x = 2.34

x = 45 - 2.34

x = 42.66

d)

56.43 - a = 34.56

a = 56.43 - 34.56

a = 21.87

e)

3.2 + a = 34

a = 34 - 3.2

a = 30.8

f)

6.7 - a = 1.25

a = 6.7 - 1.25

a = 5.45