Question

3(n-5)=21


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Answer 1

Answer:

12

Step-by-step explanation:

3(n-5) = 21

3n - 15 = 21

3n = 21 +15

3n = 36

n = 36/3 = 12

Answer 2

Answer:

n = 12

Step-by-step explanation:

To find?

• The value of n

How to find?

• We shall find the value of n by transposition method.

Now,

3(n-5) = 21

⇒ 3n - 15 = 21

⇒ 3n = 21 + 15

⇒ n = 36/3

⇒ n = 12

.°. n = 12

Checking :

LHS

→ 3(n-5)

→ 3(12- 5)

→ 36- 15

→ 21

→ RHS

.°. LHS = RHS

Hence, n = 12 is the correct solution.