Question

Give first the step you will use to separate the variable and then solve the equation:

(a) 3l = 42 (b) (c)

(d) 4x = 25 (e) 8y = 36 (f)

(g) (h) 20t = − 10

Answer 1

(a) 3l = 42

Dividing both sides of the given equation by 3, we obtain

l = 14

(b)

Multiplying both sides of the given equation by 2, we obtain

b = 12

(c)

Multiplying both sides of the given equation by 7, we obtain

p = 28

(d) 4x = 25

Dividing both sides of the given equation by 4, we obtain

x =

(e) 8y = 36

Dividing both sides of the given equation by 8, we obtain

y =

(f)

Multiplying both sides of the given equation by 3, we obtain

(g)

Multiplying both sides of the given equation by 5, we obtain

(h) 20t = −10

Dividing both sides of the given equation by 20, we obtain