The given parts of the question are solved below:

a. Here,

We have to separate the variables

Thus,

We have,

3l = 42

Dividing both sides by 3, we get,

Hence, l = 14

b. Here,

We have to separate the variables

We have,

Multiplying both sides by 2, we get

= 6 × 2

Hence,

This can be written as,

b = 12

c. Here,

We have to separate the variables

We have,

Multiplying both sides by 7, we get

×7 = 4 × 7

Hence, p = 28

d. Here,

We have to separate the variables

Thus,

We have,

4x = 25

Dividing both sides by 4, we get,

Hence, x =

e. Here,

We have to separate the variables

We have,

8y = 36

Dividing both sides by 8, we get,

Hence,

y =

f. Here,

We have to separate the variables

We have,

Multiplying both sides by 3, we get,

Hence, z =

g. Here,

We have to separate the variables

We have,

Multiplying both sides by 5, we get,

Hence, a =

h. Here,We have to separate the variables

We have,

20t = -10

Dividing both sides by 20, we get,

Hence,

t = - 1/2